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floater212floater212 Confirm Email, Member Posts: 121 ✭✭
does anyone know which mercruiser alarms that would cut the motor off? I have a 2005 212 350 MPI that gets an alarm AND kills the motor, so fast I get one sound as the motor dies but starts right back up can run all day after, maybe does it again or not for a couple of outings. had it hooked up to reader at marina, 3hrs on it and no codes. they don't know or have a direction to look for. help! someone said once it could be the gear lube tank but that only has an alarm and wouldn't kill motor.

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    Cableguy GregCableguy Greg Member Posts: 5,016 ✭✭✭✭✭
    Mine shut off with low battery voltage. The gauge was reading 10.5VDC when the alarm came on and it shut down.
    2008 280 Express Cruiser, 6.2MPI, B3, Pittsburgh, PA "Blue Ayes"
    Go Steelers!!!
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    floater212floater212 Confirm Email, Member Posts: 121 ✭✭
    all my gauges stayed in the normal positions to give no clues. there can't be that many alarms that would kill the motor..... can there be?
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    frenchshipfrenchship Member Posts: 1,079 ✭✭✭
    Here are some Infos from this website drewactual Posts: 881Member ✭✭✭✭ July 2013 edited September 2013 in RBO Forum Archives I'm aiming for a sticky with this one... It would be a good thing if folks could look through this and the other (hopeful) contributions in effort to help themselves out.. I know I'll be printing off these audible codes and keeping them on-board in my dry box just in case.. Constant tone alarms are for: 1.) engine coolant temp overheat, 2.) low engine oil pressure, 3.) engine over speed, 4.) exhaust manifold cooling temp overheat 5.) sea pump PSI low Constant beep alarms are for: 1.) low outdrive lube level. Two Alarm beeps every 60 seconds are for: 1.) Faulty cam, 2.) IAC, 3.) MAP, 4.) MAT, 5.) knock sensors. 6.) open/short in the engine cooling temp circuit 7.) open/short in fuel injector wiring circuit, 8.) open/short in oil PSI circuit, 9.) open/short in exhaust manifold cooling temp circuit, 10.) open/short in sea pump circuit, 11.) open/short in throttle position circuit - See more at: http://rinkerboats.vanillaforums.com/discussion/1012/2-beeps#latestConstant tone alarms are for: 1.) engine coolant temp overheat, 2.) low engine oil pressure, 3.) engine over speed, 4.) exhaust manifold cooling temp overheat 5.) sea pump PSI low Constant beep alarms are for: 1.) low outdrive lube level. Two Alarm beeps every 60 seconds are for: 1.) Faulty cam, 2.) IAC, 3.) MAP, 4.) MAT, 5.) knock sensors. 6.) open/short in the engine cooling temp circuit 7.) open/short in fuel injector wiring circuit, 8.) open/short in oil PSI circuit, 9.) open/short in exhaust manifold cooling temp circuit, 10.) open/short in sea pump circuit, 11.) open/short in throttle position circuit here are some factors to know- if you're experiencing limited power, and have audible codes, this may help you narrow it down: Warning system Faults, SC1000 Yes/No, Audio Alarm, Available Power %, Description. (1) Cam Sensor Yes 2 Bp/min 90% Open or short, engine must be cranking to set this fault code. (2) ECT CKT HI Yes 2 Bp/min 90% Open (3) ECT CKT LO Yes 2 Bp/min 90% Short (4) ECT Coolant Overheat Yes Constant 6-100 % Engine guardian overheat condition (5) EST 1-8 Open Yes 2 Bp/min NA Coil harness wire open (6) EST 1-8 Short Yes 2 Bp/min NA Coil harness wire short (7) Fuel Injector 1-8 Open Yes 2 Bp/min NA Fuel injector wire open. (8) Fuel Injector 1-8 Short Yes 2 Bp/min NA Fuel injector wire short (9) IAC Output Yes 2 Bp/min 90% Only with rpm (10) Knock Sensor 1 Yes 2 Bp/min 90% Alarm sounds for 20 seconds in NEUTRAL and indefinitely in gear. (11) Knock Sensor 2 Yes 2 Bp/min 90% Alarm sounds for 20 seconds in NEUTRAL and indefinitely in gear. (12) Low Drive Lube Strategy Yes Steady Bp 0-100% Low oil in sterndrive. (13) Low Oil Pressure Strategy Yes Constant 0-100% Low oil pressure strategy. (14) MAP Sensor 1 Input High No 2 Bp/min 90% Short, no visual on SC1000. (15) MAP Sensor 1 Input Low No 2 Bp/min 90% Open, no visual on SC1000. (16) MAT Sensor Yes 2 Bp/min 90% Open or short in MAT circuit. (17) Oil PSI CKT Hi Yes 2 Bp/min 90% Short, defaults to 51.7 psi. (18) Oil PSI CKT Lo Yes 2 Bp/min 90% Open, zero oil pressure. (19) Overspeed Yes Constant RPM Limit Engine over rpm limit (20) Port EMCT CKT Hi Yes 2 Bp/min 90% Open, defaults to 32 degrees F. (21) Port EMCT CKT Lo Yes 2 Bp/min 90% Short, defaults to 32 degrees F. (22) Port EMCT CKT Overheat Yes Constant 6-100% Overheat condition, 212 degreesF(100 degrees C) limit. (23) Sea Pump PSI Lo Yes Constant 6-100% Low water pressure strategy, defaults to 43.4 psi. (24) Sea Pump CKT Hi Yes 2 Bp/min 90% Open. (25)Sea Pump CKT Lo Yes 2 Bp/min 90% Short. (26) STB EMCT CKT Hi Yes 2 Bp/min 90% Open, defaults to 32 degrees F. (27) STB EMCT CKT Lo Yes 2 Bp/min 90% Short, defaults to 32 degrees F. (28) STB EMCT CKT Overheat Yes Constant 6-100% Overheat condition, 212 degrees (100 degrees C) limit. (29) Steer CKT Hi Yes No No Open and short. (30) TPS1 CKT Hi Yes 2 Bp/min 90% Short, signal to 5v+, engine will not start. Refer to data monitor screen. (31) TPS1 CKT Lo Yes 2 Bp/min 90% Open. (32) TPS 1 Range Hi Yes 2 Bp/min 90% Above 4.8v, 994 counts. (33) TPS 1 Range Lo Yes 2 Bp/min 90% Below 0.5v, 35 counts. (34) Trim CKT Hi Yes No No Short, high range, visual warning on SC1000 only. (35) Trim CKT Lo Yes No No Open, low range, visual warning on SC1000 only. (36) 5 VDC PWR Low Yes 2 Bp/min varies Short any 5v+ to ground. known and common issues: IAC's... these things are notorious for gumming them up... 2 beeps every minute, limited to 80% power. Gear/lower lube sensors... sometimes they are hung, sometimes they are bad, most often they are truly empty- constant beep, 20% reduction in power.. Sea pump... your engine isn't drinking like it should, or the sensor is corroded and thinking it isn't.. constant tone.. please add as you see fit? I'm thinking this may help someone with a signal on their phone and a "boat turned raft"... if so, mission accomplished.
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    floater212floater212 Confirm Email, Member Posts: 121 ✭✭
    I have read those but none say it will cut the motor off. if anyone knows of any sensor alarms that will cut the motor that they have had maybe that would help in my search for my dilemma.
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    212rowboat212rowboat Member Posts: 2,591 ✭✭✭✭✭
    I typed the reasoning in another thread for your issue, but can't find it..

    There is a good chance either your crank position sensor (ckps) is dying, which will cause alarms, but when the engine loses position/mapping, it will die.. ckps usually die in a certain range, and that range grows to effect other ranges.. or.. camshaft position sensor or cps.. same thing, but it usually doesn't care about a specific range.. losing wither will cause the engine to behave dang strange in the seconds before it dies, and may store multiple codes in addition to the cps or ckps..
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    floater212floater212 Confirm Email, Member Posts: 121 ✭✭
    there were no code anywhere after 3hrs on diagnostic. and I can't find the crank position or cam position sensor. it may run great ALL day or week or month but then all of a sudden a stall, dies then restart and it's fine... for a while or day or month. weird.....
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    212rowboat212rowboat Member Posts: 2,591 ✭✭✭✭✭
    Those two would definitely code.. so.. if they're not recorded, chances are it isn't them.

    Are you sure it's an alarm and not the tone between key on and before you hit the starter? I'd be looking at main engine grounds, then connections, especially the pcm's..
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    frenchshipfrenchship Member Posts: 1,079 ✭✭✭
    Try this just have the engine running at idle and start wiggling the main plug to the engine and other connectors. Watch ourself while the engine is running .it could be a loose connector somewhere , my friend had the same problem with one of his engine and it turn out to be the main wiring harness that had a bad connector at the engine
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    qwikwhipqwikwhip Member Posts: 63 ✭✭
    Try this just have the engine running at idle and start wiggling the main plug to the engine and other connectors. Watch ourself while the engine is running .it could be a loose connector somewhere , my friend had the same problem with one of his engine and it turn out to be the main wiring harness that had a bad connector at the engine
    I second this! I had an intermittent issue like you are having that turned out to be the main harness. I actually found it by mistake be leaning on it while searching for the problem. Cleaned the contacts and used some dielectric grease and it's been fine since.
    2005 Captiva 232 Liberty Edition, MX6.2/B3, Corsa
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    raybo3raybo3 Administrator Posts: 5,469 admin
    Might have a bad ignition switch. Might not be an alarm but the buzzer when you first turn the key. Switch could be shutting down the engine.....
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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