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#1
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Merc. alarm horn frustration.
OK.. Engine is a 1991 Mercury 200 HP 2.5L. Converted to Electronic Oil injection.
When I got the engine the PO told me that the engine ran fine but then the horn started sounding whenever it was started up or at idle. As soon as you gave it some gas the horn stopped... and I found that to be exactly the case. Engine is a screamer, and I've never had any problems with it other than the horn. Water pump is replaced every other year, tattletale stream is forceful and constant. Thermostats were replaced 2 years ago. Mechanical Oil injection was replaced with an electronic oil injection system 2 years ago. Engine was lengthened from a 20" to a 25" when I hung it on the back of the V21. Cold and warm compression numbers are all within 5 lbs of each other on all cylinders. But The damn horn continues to sound. Constant sound as soon as you turn the key, not a series of dots or dashes. Anyone have any idea what the hell is causing the problem, or at the very least how to fix it? It's really getting to me and truthfully I don't want to trailer the damn thing down to Spare to have him fix it. (Not that I don't want him to, he's the only guy I'd trust that's semi-close by. I just don't want to make that trip twice). (once to drop off the boat and once to pick it up)
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God)  Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless. 
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#2
07-29-2016, 04:25 PM
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D, according to the manual on the 2.0, constant beep is overheat and intermittent is oil injection. When u turn the key on ,should get a long and 3 shorts. This is the systems self check. I think that is controlled by the oil alert module. That's what went south on mine and didn't alert me to the low oil in tank. Maybe spare or ferm know of a way to test it.
Did u have to bypass any of that when you installed the electronic. Oil pump.
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#3
07-29-2016, 05:54 PM
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Did you install the longer tube for the water pump for a 25 inch leg?
__________________
1985 Wellcraft V-20, Evinrude ETEC 150: SOLD 1979 Marine Trader 44, twin Ford Lehman 120s 2006 Panga 14, Tohatsu 20
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#4
07-29-2016, 08:09 PM
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the alarm module is bad
__________________
1981 V20 cuddy 2007 225 optimax http://budgetboattowing.com/ http://www.gardenstateyachtsales.com/
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#5
07-29-2016, 09:37 PM
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Need to isolate it out. I would unplug the oil injection warning module and see if it stops going off. If that doesn't do it, unhook the overheat sensor(s). Just have to work your way down the chain until you find the problem. On an older engine, it could also easily be corrosion making continuity occur where it shouldn't.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR 2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD  AND THE PINK JEEP!!!! R.I.P. http://www.wellcraftv20.com/communit...ad.php?t=11664 
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#6
07-29-2016, 11:21 PM
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Quote:
__________________
1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God) Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#7
07-29-2016, 11:23 PM
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Quote:
__________________
1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God) Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#8
07-29-2016, 11:28 PM
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Quote:
The Electronic oil pump just replaces the mechanical one. None of the installation bypassed those systems. The horn sounded before I put in the electronic injection, just went away after the engine speed increased so I lived with it. but now it's constant no matter the speed. This (the constant sounding) all started after it came out of it's winter slumber this year.
__________________
1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God) Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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#9
07-29-2016, 11:31 PM
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Quote:
THANKS TO EVERYONE for their suggestions... I'll keep everyone informed as I work thru it.
__________________
1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer 1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer 1996 V21 w/1993 200HP Mercury on a Shoreline Trailer All towed by a 5.7L Hemi Durango. If God didn't have a purpose for us we wouldn't be here, so Live simply, Love generously, Care deeply, Speak kindly. (Leave the rest to God) Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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