Mercruiser 350 mag guardian mode. 2 mX's with SmartCraft.
Mercruiser 350 mag guardian mode When I brought the boat back to the shop and they plugged in the computer, it once again showed the “Low Sea Pump Pressure” code had thrown but the pressure, as per the Customer: I am trying to understand the wiring system for a Mercruiser trim limit switch. Mercruiser 5. 35. Everything works fine, except the computer thinks outdrive is not down and is keeping RPMs below 2800. Next Last. Mercruiser Hilton manual indicates open circuit on cyl 7. 2A191167 = MERCRUISER 350 B EC 6R 350 MAG BRAVO MPI Do you know if your engine has "DTS" Throttle Body, Digital Throttle and Shift? It’s almost certain you are in guardian mode here. MerCruiser 350 MAG MPI Tow Sports ; MerCruiser 350 Magnum EFI GEN+ Alfa One ; MerCruiser Categories. General Q & A - Guardian mode - 496 mag ho - I have some strange problem with my Mercruiser 496 Mag HO. Mechanic's Assistant chat. NO power reduction mode MEFI 3 1999 till ECM 555 and PCM 555 came about 2001 had NO power reduction mode ECM 555 and PCM all have reduction mode for a lot of stuff ranging from 5 % to 100 %. Sign In Upload. The Marine Electronics Specialist I'm going to connect you with knows all the tricks and shortcuts. and the winner is. I posted this in an older thread but it might be worthy of its own thread. I have a 2007 Mercruiser 496 8. 3, 5. On the 350 MAG MPI rough running is almost NEVER gas related its 80% distributor/ignition related or 20% sensor issue. Some days the guardian mode. The sensor issues are easy to fix because they set a code and sometime beep the guardian horn. 1 Horizons 1998 Pro-Line 190 Sportsman - 115HP Mercury 1969 Boston Whaler 13 - 40HP Mariner 350 MAG W/DTS Bravo 3 Not sure if these cover all Mercruiser EFI set ups from Small to big block but there are likely many many similarities. The guardian mode is there for when the engine runs too hot, and limits RPMs in an attempt to let the engine cool better. 2002 model. I installed a MCM 350 Mag MPI engine in my boat that has a Volvo SX outdrive. Thread starter Rich990; Start date Aug 16, 2021; The Merc Guardian system is reducing your RPMs to 2,500. Engine Brand: MerCruiser Year Built: 2005 Engine Model: 350 MAG MPI Bravo III Engine Type: Inboard/Outboard Engine/Fuel Type: Gas/Petrol Engine Hours: 267 Propeller: 3 blade propeller Drive Type: Stern drive Engine Power: 300 HP to this I say bull 350 mag goes into guardian mode intermittently without any alarm. After 35 min at 1500 to 2000 and out of no wake zone and back to 4000 rpm the best I can get is ten and falling to as low as 5 to 6 psi. the IAC plugged and blocked the air enough that at high RPM it would go into Guardian mode (with Hard Alarm -continuous alarm) limiting power to 80% until I replaced it. I have a closed system. Guardian mode on 2006 mercruiser 350 mag horizon mpi with closed. 8 1994 Sundancer 300DA, Twin Mercruiser 260hp/350 , Alpha One Gen II Trailered tri-axle LoadRite roller. The guardian comes on when it shows higher than 125 PSI. Answered by AntonioC93 in 1 day 3 years ago. Normally you'd get an alarm, but since the engine was retrofitted into an older boat all that may not be hooked up. Basic Boat Operation. Twin Mercruiser 8. That's what you get with the 350 MAG MPI. . Jake315 Cadet. Severe loss of power on my 2002 350 MAG MPI-gctid390524 06-10-2012, 11:27 PM. With the problems I had. Dealer not Big-time performance in a small-block V-8. Good Ventilation. The fault depicted on Vessel view said "2031-23 Guardian due to exhaust manifold Temperature" Then it goes on to Mercury MerCruiser Sterndrives & Engines . Thanks 350 MAG EFI 1996–1997 0F800500 0K001509 TBI MEFI 1 & 2 4 350 MAG MPI 1995‑1998 0F415189 0L339999 MPI MEFI 1 & 2 4 350 MAG MPI 1999–2001 0L340000 0M299999 MPI MEFI 3 4–5 350 MAG MPI MCM 2001–current 0M300000 Current MPI ECM 555 6 350 MAG MPI MIE 2001–current 0M310000 Current MPI ECM 555 7 Black Scorpion 350 MAG Alarm Going Off for Mercruiser 350 Mag MPI. MEFI 2 98 year model GM ECM model number 16210729 - used for the 1998 350 mag and the L29 7. Starboard engine Mercruiser 350 Mag MPI - Breaker / Guardian mode. Some days it runs perfect. To reset the Guardian System protection: 1. By chatting and providing personal info, you understand Mercruiser Mechanic please I have a 2013 Mercruiser 350 Mag engine and need a question answered in regard to oil type. IF sea water /Block pressure is zero while running, This will put you into guardian mode. Starting last Fall 2019, while running at 3/4 throttle to near WOT my SmartCraft gauge would most of the time, go into Guardian Mode, limiting engine power and sounding several Customer: Guardian mode on 2006 mercruiser 350 mag horizon mpi with closed loop cooling. Feb 5, 2012 #1 I've just had the engine out to replace the gimble pin, while it was out it was serviced very badly, since I got it back its had a misfire,cut a long story If your engine controls are designed to use the sensor, it will throw codes if not connected. Since then the port engine has been a huge headche. Boat does NOT go into Engine Guardian Mode 3. The computer of the boat is General Q & A - Engine wont pass 3100-3400 RPMs - 350MPI (03') - I have dual 2003 350MPI engines (bravo 3 drives with 26 pitch blades) and my starboard engine is having issues underload. Put in water yesterday. Just changed the raw water impeller today. Oil pressure and water temperature sending gauges are normal. Thread starter spunkyman; Start date Jun 28, 2019; 1; 2; Next. To me, all the signs point to a faulty connector/circuit somewhere. Port motor Goes into guardian mode. Go. The computer is not showing any error codes. There are others but this is the one that doesn’t always alarm or show up. No boiling over, exhaust elbows were hot but could touch for a sec or two. about 3 at idle. 0MPI w/ Bravo3 2004 Triumph 190 Bay - 115hp Yamaha 2003 Triumph 170cc - 70hp Yamaha 1988 Pro-Line 17 - 90HP Mercury 1987 Thompson 196 - 165hp NOTE: If NOT Using MerCruiser Timing Tool: With engine running, set the scan tool or Marine Diagnostic Code Tool to the SERVICE MODE and follow manufacturer’s instructions. I found the fault that was sending the motor into guardian mode. 2. Fun Times Moderator. Also flushed the system but still setting the alarm and goes into Guardian mode. Thread starter hoylegj; Start date Feb 5, 2012; H. Comment. Since this engine is new to this boat, Being down 200 rpm could be anything from normal to this boat to being in Mercruiser guardian mode @ 90% available power, To wrong size props, gears, all around weight of every factor that is Guardian mode on 2006 mercruiser 350 mag horizon mpi with closed. The sender goes Shotly after enjoying for a few months, the guardian mode started to become active after 3000rpm, not sure if is relevant, but it started to happen after the boat tilted a little and I used the trims to stabilize it. Customer: 350 mag goes into guardian mode intermittently without any alarm. Have twin 2003 6. Key Features. It will work on most 1993 to 2000 marine EFI systems with the ten pin Data Link Connector. Mercruiser 350MAG MPI 5. The sensor in mine is separate from the gauge sender. Scan the engines and there are no 350 mag goes into guardian mode intermittently without any alarm. When it's working properly, the code clears. 0 I would be more concerned about being stranded at sea in guardian mode with a storm approaching than I would worry about the small additional risk of sinking due to an extra thru hull. After about 30 minutes of running at any speed, it throws a continuous alarm and goes into guardian mode limiting RPM to 1000. I found an older thread on this forum discussing possible alternatives for the "OEM" sensor, which costs about $140, and New Eagle was mentioned as possibly being the sensor manufacturer. Post Cancel. 2). But its like the rev limiter kicks I've got a 350 Mag that goes into guardian mode about 3000 rpm. Once on plane, it wont pass 3100-3400. The distributor failed csusing a misfire which bent a General Q & A - Why no oil cooler 350 mag MPI - Makes no sense, even on a tow boat under strain could benefit. The old one looked fine. Everything is working correctly, except that the engine is in Guardian Mode and is limited to 2,800 RPM. You This list is specific to PCM-555 engines (496 MAG and 8. after I slow it clears but will You can reset the Guardian mode, and then run the engine watching the live data, to see where the anomaly may arise, and how/when it goes into Guardian mode. Joined Jul 17, 2011 I’m not sure if that’s guardian mode Here is a Mercruiser academic reading the fault codes with a meter: '02 280 DA - 496 MAG B III SOLD Air Bella - '07 Zodiac Fastroller RETIRED. The boat currently has 275 hours on it. Yachtwork | MEC3 and RYA Yachtmaster Ocean. No load it hits the rev limiter. 2018. 2004 Mercruiser 350 Mag MPI Alarms [SSSMJA] It might be time to change the The engine is in guardian mode max RPM 2500 to 3500 and the throttle body is By chatting and providing personal info, you My Mercruiser 350 MAG MPI power trim will not raise the lower. 7 MPI - Check Engine Code Reset Got it cleared today by a local tech with his laptop tool. My oil gets 180 or so is this too much? for a warning horn about low / no oil pressure including the 4 bangers as well except without putting the engine into guardian mode = carb engines. mercruiser mpi 350 mag tow sports. Customer: OBD Service Soon, STBD System fault 71 120 hr on mercruiser 350 mag MPI 2013. 40. Here are the quick details: —24 foot Sea Ray that had a 350 Mag MPI —Haven’t touched the props or Bravo III drive (same as before repower) —Went from burning 11. This fault will generally put you in the guardian mode and reduces available power to 6- 100% per the manual, but my experience has been in the 80-90% range. Jason I have a 07 320 Sundancer with twin 350 mag mpi mercs and a v drive transmission. Verified water pressure read out with 0-15 PSI manual pressure gauge on a tee at the power steering cooler. Jul 14, 2019 Starts out at 14 to 20 and falls as low as 5 and sometimes goes into guard mode. 0 MPI SN OW003759 with Bravo 3 SN OW108118. View More. Over a 15 years of working on all the brands of outboards. 2001 350 mag mpi slight misfire. I have a 2004 Mercruiser 5. 1,193 satisfied customers. But most of the time when I going over 3700-4000 rpm. Reengage the throttle. 3 MPI, 5. James. I have a mercruiser mag mai going into guardian mode and the dealer scanned it but there was no fault codes. 2) It only starts to sound when the boat is on a plane (RPM 3200 +) 2. On our last outing, the boat ran fine for a couple of hours but then once again we got the dreaded continuous alarm with the accompanying Guardian mode and restricted power. General Q & A - Going in Guardian mode - I just joined the Forum. I have a 2008 Searay 250SLX with a mercruiser 350 MAG. Port engine has no issues getting to 4100 (normal for my It appears that my water pressure sensor is faulty, which I understand is a pretty common problem. Is this a faulty Water pressure sensor? 2004 Sea Ray 340 Sundancer - Twin Mercruiser 8. That "cutting out" you're hearing/feeling may be the ECM in a soft guardian mode. 2002 MerCruiser 350 Mag MPI Horizon 300hp: Is it normal for a Mercrusier 350 Mag MPI engine to labor for the first. 5 Bravo 3motor 36 hours on Engine at above 3500 rpms. Water PSI is at 15. 00 for. Engine Redline is 5200. 0, 350, 6. Motor: 4 year old merc 383 mag stroker. Most common cause is the SW pressure sensor. 350 MAG engine pdf manual download. 6. In all this checking and replacing fuel filters and putting batteries back in ECT I got it in the water and it idles, starts, and runs at low RPM perfect. This Engine Guardian Strategy. 0 MPI that is going into guardian mode. (30 minutes outbound, 3 hour return. Water pressure is showing 20 PSI at Idle and over 100 at 3000 RPM. 2004 Sea Ray 340 Sundancer - Twin Mercruiser 8. 7 that goes into guardian mode intermittently Mechanic's Assistant: Sometimes things that you think will be really complicated end up being easy to fix. Ken Stephens Seaman Apprentice. After about 30 minutes of running at any speed, it throws a continuous alarm and goes into guardian mode limiting RPM to Mercury MerCruiser Sterndrives & Engines . Yes the Guardian mode kicks in and is required to go to idle to recover from loss of power. I'd like to say I flush religiously after every trip. Moving throttle lever back to idle, or to the required reduced throttle position, resets the system. reducing power and rpm. Catalyst is not working properly. Yet my engine Trims go up and down fine. I recently started getting an alarm at high RPM's. On 350 Mag MPI Model, engine RPM will automatically increase to a higher RPM. starting at the key switch as it may be turning off and on the ignition randomly which is usually a one beep reset mode and if so, it wouldn’t show a code on Mercruiser 1998 350 MPI MIE SKI MAG 0L305632 Stalling The story -- its a Tige bowrider and we took on a LOT of water -- Q&A: Mercruiser 350 Mag MPI - Oil Pressure Sensor Location, Guardian Mode Reset, Ski Mag & More Mercruiser 377 MAG MPI overheating with Guardian (2014 260 EC) 2008 350 EC on Georgian Bay. Jul 3, 2018 #8 Jake315 said: BB two indicators related to fuel system. Joined May 16, 2009 1998 Stern Drive 350 MAG [BRAVO MPI Customer: I own a 2012 sea ray 280 with Mercury 350 mag seacore. TeamAllen I have a 2011 350 mag Bravo III Ciera 2855. ) Doesn't happen in neutral at the dock, only underway. Have twin 377, 320 horsepower engines Took the boat out this morning and when I powered up it went into Guardian mode. The Check Engine code was indeed left over from when my alternator packed it in. Customer: Have a mercruiser 5. You'll enjoy outstanding top-end throttle response, easy starts and excellent day-to-day operation, compliments of the MEFI 3 Electronic Control Module with multiport fuel injection. 2019, 2020, 2021 same repair of Cap, Rotor, Plugs but Plug wires added last year and it clears codes and runs fine. 3. 38. Ran flawlessly up to 200hrs,,got around 240hrs now with an annoying warning 'overspeed throttle back' massage on the port engine only. If pressure is low it will put the engine into limp mode. including 496 MAG and 8. 0 MPI Bravo III, Raw Water Cooled with 310 hours; Low water pressure alarm and occasional guardian mode at low rpms, alarm generally cleared by giving it some throttle, increasing RPMs a little. Engine mounted on a Dyno, starts and runs great but will not accelerate past 3200 rpm. Mechanic cleared them ran the engines and smelled a lot of oil coming from catalytic converters. Replace the pressure sensor and check the connector for corrosion. Temperature is running good at about 160. Problem was intermittent at first but i can reproduce Gettin low block pressure alarm on mercruiser 4. hoylegj Recruit. It does not overheat. All gauges report normal operation So given the above, and in specific since the boat doesn't go into Engine Guardian Mode I don't believe you have an engine fault here (or at least a major fault). For a detailed list, including a full troubleshooting guide, get a copy of Mercruiser Service Manual 33 (for PCM-555 engines) or Service Manual 36 (for ECM 2007 Sea Ray 240 Sundeck 350 MAG W/DTS Bravo 3 Galaxy Blue Customer: I have a 2014 Mercruiser 350 MAG that is having low water pressure issues. and the scan tool says the Guardian mode is coming on due to low water pressure, the solution should be in this area. I had a similar issue with a 2013 with twin Mercruiser 350 Mags, Bt Doctur Supreme Mariner. If your not going into guardian mode and the motor is performing well, ignore the sensor This complete NEW 5. 2004 350 MAG #0W010098 I guess the water sensor is something I should consider replacing for 2020 as a maintenance item? Its a FW lake boat raw water system. Joined Jul 3, 2018 Messages 9. 8 gallons per hour at cruise 2. Just make sure the ECM ain't locked in "service mode"! The only other temp related sensor is the CTS & will show a code when scanned. 2,143 Satisfied Customers. If a malfunction is detected, a fault description is stored in the PCM and the available engine power is normally reduced. Same code and has misfire underload (most of this detail is from text message from my husband) . BUP, I have a question if you don't mind. Below are the facts of the case as I can best tell-1) I can run the engine at 1800rpm for two hours (did it) with no alarm. Similar to ECM 555 engines (4. Dash gauge shows a normal engine temp. Customer: Mercruiser 1998 350 MPI MIE SKI MAG 0L305632 Stalling The story -- its a Tige bowrider and we took on a LOT of water -- engine stalled out we towed it back -- bailed it out, dried it out found water in tranny fluid and oil. Oil pressure sensor 350 MAG Mercruiser Smart Craft Oil pressure sensor 350 MAG Mercruiser Smart Craft. Just replaced impeller because the boat was overheating. After about 20 min high temp alarm with guardian mode activated. Also new Thermostat. Jul 3, 2018 Can't ignore it cause it sends the boat into guardian mode, and reduces power. Oil PSI. Temperature Fluctuates - 2015 350 mag mpi ec The boat is a 2015 Stingray 225 LR with a 350 mag mpi and a Bravo 3. I've changes the cap, rotor, plugs, wires, impeller, oil, checked all connections, battery cablesnow took it out for a trialsame thing constant buzzer and it goes into Guardian Mode. Just repowered with a 2020 Mercruiser 383 MPI and am having performance / excessive fuel burn problems. Motors 2008 - Mercruiser 350 MAG MPIs I launched the boat a few days ago and she ran great. It is in Guardian mode. Degree in Marine Technology. Apparently I have to install or mimic the Trim Limit Switch so that the computer will not put the engine in Guardian Mode. Poor Ventilation. Engine You have to get the motor warmed up, put the engine in base timing mode through the computer and it will advance itself to about 1300rpm, then set the timing at 0* on the marks, lock down the distributor, take engine out of base timing mode and call it good. Arthur Frank. MerCruiser Guardian Low Water Pressure Fault . 12 years If Guardian System is activated, the system must be reset before the engine will operate at higher speeds. Mercury MerCruiser Sterndrives & Engines . Joined Jul 9, 2018 Messages 34. 1 with bravo 3 and has 130 hours. Also for: Seacore 377 mag. This includes MerCruiser, Volvo, Crusader, PCM, Indmar, and a few others. 11,317 Satisfied Customers. Staff member. Joined Feb 4, 2012 Messages 5. 2 MPI). I was 2003 Mercruiser 5. Boat Engine Parts Guardian Activated- Overheat code 321, 322 fuel trim Replace thermostat Guardian Activated- Overheat code 321, 322 The engine periodically gets stuck in the Guardian mode and the scan tool. Boat is a 2003 Maxum with Bravo III's. This was/is all on the starboard engine. (2016 - 2024, SOLD) Save Share I have a 2007 320 Sundancer with 2 350 mercruiser mag mpi with v drives. 0L and 5. Safe Boating Suggestions. Joined Aug 29, 2004 Messages 19,325. 7L 350 Horizon MPI, v-drive. From what your describing the engine is going into "guardian mode". Gas and diesel marine mechanic. Emission control problem. spunkyman Petty Officer 2nd Class. Today I went out, ran it for 10 min, and the alarm sounded. Took her up to 3500 rpm and cruised around 3100 rpm for a little while. Jump to Latest Community Feedback: New Forum Software Is Live! (sundancer 270 with merc 496 Mag HO) I purchased the scan tool it was my oil pressure sensor. J. PCM 09 many many reduction modes I'm new here and looking for a little help. "Trim Sensor not working properly" ever since this one came on it seems like the boat is in a guardian or limp mode. Since the middle of last summer I have been getting a System Fault (Engine Misfire) (STBD System Fault 71). Expert. Replaced the impeller, thermostat, water pressure sensor, and intake hose. (2016 Guardian alarm is going off on Mercruiser 350 MAG. Tell me a bit more about what's going on so the Marine Electronics Specialist can help you best. 0 MPI, 350 MAG MPI, MX 6. He thinks it is related to last mechanic winterizing it. 1 of 2 Go to page. 1 Horizons 1998 Pro-Line 190 Sportsman - 115HP Mercury 1969 Boston Whaler 13 - 40HP Mariner Previously owned: 2003 Sea Ray 260 Sundancer - Mercruiser 5. We recently purchased an 02 2855, and had a great 200 mile run home from Lake Union to Comox B. This list is only a summary. I have issues with the alarm going off and then going into guardian mode at about 3000 rpm Took it to the dealer for a scan and they said it was temp related. How to hook it up: 1) Ignition key 'OFF" 2) Remove the cap from the Data Link Connector (DLC) Mercury MerCruiser Sterndrives & Engines . Therefore I purchased the Mercruiser Vessel View. 350 MAG W/DTS 2003 Rinker 342 Fiesta Vee, 350 Mag MPI, Bravo 3 2. Checked the oil the next day and I was a tad above the hashes so I took out 1/2 a QT. I have a new to me boat with 2 2003 350 Mag MPI Horizon inboards. Abiorca. This chart is for informational purposes only and is I have a mercruiser mag mai going into guardian mode and the dealer scanned it but there was no fault codes 350 mercruiser mag mpi. WOW what a bummer. When I first got it in June both engines ran fine all the way to full throttle . Perhaps you have one but are not aware, of you don’t have the gauge for it? 4th year in a row our Monterey M5 350 Mag MPI is miss firing same long warning code above 3000 RPM, reduced power to beep per minute. He said mercruiser is now advising to not run mpi engines on a mixture of gas and oil. I changed the Mercruiser 5. 30. AntonioC93 | Expert. This is crazy but if you overrev this engine it goes into Guardian Mode and limits rpm until the dealer clears the codes! The whole point of trimming my Hydrostream air entrapment hull w/ the . C. Guardian mode on 2006 mercruiser 350 mag horizon mpi with closed loop cooling. Be Alert to Carbon Monoxide Poisoning. The Engine Guardian had kicked in so the actual code was an Over-Rev code (actual engine RPM was only 2900 at the time). Also has a closed cooling system. 0MPI w/ Bravo3 2004 Triumph 190 Bay - 115hp Yamaha 2003 Triumph 170cc - 70hp Yamaha 1988 Pro-Line 17 - 90HP Mercury 1987 Thompson 196 - 165hp In this episode, I remove and clean the Water Pressure Sensor in our Mercruiser 350 MPI. Long story short problem solved for 1/2 of his labor. alldodge Moderator. It was full of salt and sand and was giving a low reading on the Gar On Mercruiser website it says the 350 MAG mpi has his operating range ending around 5000 rpm's. Changed Mercruiser 350 MAG MPI - Alarm tones-gctid751093 07-15-2016, 10:26 AM. Serial number is 2a504974. I plan to run at 2011 Sea Ray 220 SD, Mercruiser 5. 1,193 Satisfied Customers. 1S), but the basic features are similar for ECM-555 engines (4. My starboard engine will go wide open throttle with the trim tabs up to about 4550 rpm and my port engine will go approximately 4800-4850 rpm at WOT. Water pressure, water temp, oil pressure all indicate identical on both SmartCraft gauges Tried swapping the ECM 555's and Re: Mercruiser 5. You do not have to increase it manually, as stated in the following steps. The two beeps per minute alarm is going off. 2 mX's with SmartCraft. Hi all! The IAC is a non-critical alarm (also why the boat doesn't go into Engine Guardian mode) and so it's not logged. Zackman, On newer Merc engines, the PCM Engine Guardian system monitors the sensors and the sensor wiring circuits incorporated on the engine. 2007 320 5. Some days the guardian mode kicks in every 15 seconds if I am running over 2k rpm. After about 30 minutes of running at any speed, it throws a continuous alarm and goes into guardian mode limiting RPM to Ok new pump impeller psi good at idle and up to 19 at 4000 rpm this is all good for about a45 min run to a no wake zone. I’m quite surprised your 350 MAG doesn’t have a water pressure sensor. Thank you. If the sensor itself is bad you should get a " Sea Pump CKT Hi, or Lo fault. I replaced the pipe connector and refilled the Customer: I have an Mercruiser 350 MAG that is going into guardian mode after running at cruising speed ( 20 MPH, 3800 RPM) for 15-20 minutes. A failed alternator will cause it to go into Guardian mode as will Over Temp, Low Oil and a bunch of other things that can damage the engine. The distributor is the downfall of this engine. Also where located on engine? The cost is not the issue when compared to everything. Mercruiser (34)Guardian Mode(34) question-gctid825237 09-19-2017, 04:44 PM. Best to get a code reader. It all started last year - the engine going in to guardian mode sporadically, for example sometimes when i fire the engine up or just going at idle, or above. 1S. It has gone in to Guardian mode and I need to figure out what is causing it. Ask Mercruiser 350 MAG MPI Ran it for 3 hours last Fri, Sat, Sun. 0 Going into Guardian Mode. Joined Mar 8, 2009 Messages 42,413. Will only present itself to the code reader when the alarm is actually present. I was getting an alarm and going into guardian mode which they fixed with a water pressure sensor. Shop manager also said they have a 2005 350 Mercruiser doing the same thing. guage on the dash is fine, the sensor is Re: Mag 350 MPI Won't Run Under Load - ECM 555 Failing??? First, if what saying is true, that after it cooled down it ran better. These codes can be pulled in many ways including using a diagnostic tool or decoding the flashing pattern of the check engine light. Your old IAC may be been Customer: I have a Mercruiser 350 MAG MPI, having problems with a constant beep at 3000+ RPM and it going into Guardian Mode. Page 41 Section 3 - On The Water MerCruiser fault codes are diagnostic codes that apply to given malfunctions. 4 MPI - had . AntonioC93. Home. I didn't miss If the sensor gets clogged with debris, fails, or the flow pressure is low when above 3000 RPM, then there will be a constant alarm and guardian mode will reduce engine power Customer: 350 mag goes into guardian mode intermittently without any alarm. My display guage has a digital water PSI reading . 7L with Bravo 1 cutting off when put in gear The diag cable does not show any obvious codes except that it has gone into guardian mode at 90% power when we try to apply throttle. P/N? I'll guess I'll find it the Mercruiser IPB. How it works. My 2006 model had one. 7L sterndrive engine applications. Answer to post #6 and other questions I missed are it one long alarm and goes into guardian mode, doesn't shut off but View and Download MerCruiser 350 MAG owner's manual online. 0MPI w/ Bravo3 2004 Triumph 190 Bay - 115hp Yamaha 2003 Triumph 170cc - 70hp Yamaha I have Merc 350 Mag with Bravo 3 sea ore Outdrives and my smartcraft gives me some overheating errors as well Mercruiser 350 MPI beeps 6 times 05-07-2017, 06:28 AM. On Sunday I was on a 20 mile cruise down the lake and received "STBD system fault 19 Catalyst. 2008. Jason. (Limp home/guardian mode) is when the boat all of a sudden will not go above 2500-3000 rpms no matter what the throttle position is. Completely reduce throttle for two to three seconds. I have a 2011 Ciera 2855 350 MPI engine Bravo III I just did a tune up replacing all with Original Mercruiser parts. Warning Horn Signals. 20:1 w/ 22p 4 x4 props 0 · Share on Facebook Share on Twitter reneechris14 Member Posts: 3,134 I installed a moderately used 350 MAG MPI Horizon in my sterndrive boat. 7L GENUINE MerCruiser MAG MPI engine package is designed to work with all MerCruiser ALPHA ONE outdrives and replaces 1980 and later MerCruiser 5. but I flush about 90% of the time. Mercruiser 350 mag bravo one. This home made code tool works every bit as well as the one I paid $50. Download Table Engine Guardian Strategy will reduce the available power level of the engine to help prevent damage from decreased water flow to the engine. 39. Compatible Drives: Alpha, Bravo One, Bravo Two, Bravo Three MerCruiser 350 Mag, Bravo 3, 2012 REPAIR HISTORY #1 Rolling View Guardian Activated- Overheat fault code Replace pump impeller and Go. Any one have similar issues or thoughts? Location: Edgerock The gear oil connector broke off dumping gear oil in the bilge this then set off an alarm and the engine went into guardian mode. Something is limiting the engine. I have installed a Mercruiser 350 Mag MPI engine in my boat that has a Volvo SX outdrive. I mainly boat in brackish water. baqxpamocyzjopitgflapmsgaxxhhwbqgmmqbqzqipuplvkrdefkkaahgqyrmcvszzibhsqwstrdlt
