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If a tachometer is going bad will cause erratic starting,
If a tachometer is going bad will cause erratic starting, runs sometimes, dies unexpectedly,sometimes starts right back, don't start at other times, runs great at times, synchronizer will show rpm bal… read more
Charles
Charles
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My sea ray goes very slow like 5 mph and won't speed up. it
my sea ray goes very slow like 5 mph and won't speed up. it would do it randomly. Any ideas?… read more
Tan
Tan
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I have a 1976 Mercruiser 228 MCM that seems to run perfectly
I have a 1976 Mercruiser 228 MCM that seems to run perfectly for 25 minutes, then suddenly dies at idle and if switch to gear. Will restart but continues to die, I replaced coil and condenser and am u… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,872 satisfied customers
Running my89 Mercruiser 5.7 260 hp, Alpha I outdrive yest;
Running my'89 Mercruiser 5.7 260 hp, Alpha I outdrive yest; after 15 min,at 3000rpm, sudden metallic grinding sound in engine compartment, and immediate engine stall. Able to restart after 10 min 'coo… read more
Tan
Tan
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Hi. I have a 2005 Mercruiser 4.3 tks that I am having problems
Hi. I have a 2005 Mercruiser 4.3 tks that I am having problems with. It will start up beautifully and run like a charm for a couple of weeks. Then when I am cruising along, it will just cut out, sputt… read more
Jason
Jason
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Vocational, Technical or Trade School
24,872 satisfied customers
2004 Mercruiser 5 liter MPI, 260 HP, approx 275 total hrs.
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James
James
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Vocational, Technical or Trade Scho
4,094 satisfied customers
Would a faulty IAC motor cause 2 burnt (melted) pistons in
Would a faulty IAC motor cause 2 burnt (melted) pistons in my new Mercruiser remanufactured 8.1 Horizon inboards? I also noticed that when I have my engine in neutral and advance the throttle it will … read more
James
James
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Vocational, Technical or Trade Scho
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I have a 1987 Alpha 1 Mercruiser 3.7liter I/O which I have
I have a 1987 Alpha 1 Mercruiser 3.7liter I/O which I have owned since purchased new. Have had very little problems with the engine. Replaced the outdrive about two years ago due to fishing line destr… read more
Tan
Tan
MerCruiser Certified Technician
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I HAVE 115HP OMC TURBOJET. UNDER OPERATION WHEN TACH READS
I HAVE 115HP OMC TURBOJET. UNDER OPERATION WHEN TACH READS ABOVE 3000 RPM THE NEEDLE FALLS TO ZERO. SOMETIMES POWER LOSS BUT NOT ALWAYS. IF I THROTTLE BACK THE TACH WILL RESUME UNDER 3000 RPM. POWER P… read more
Tan
Tan
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Hi, I have a 4.3L mercruiser w/ alpha 1-gen2 outdrive. I just
Hi, I have a 4.3L mercruiser w/ alpha 1-gen2 outdrive. I just changed the water pump (impeller) and when I tried to put it into gear (forward), the drive shaft would tumble and not engaged. I tried th… read more
James
James
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Vocational, Technical or Trade Scho
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I have a 315 hp yanmar engine in my 2004 Albin. Engine has
I have a 315 hp yanmar engine in my 2004 Albin. Engine has 820 hours on it. It has always been reliable until just recently. I had a day out at the canyon trolling about 8 hours. Hooked up and dropped… read more
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i have a yamaha 40 outboard everything runs good foward and
i have a yamaha 40 outboard everything runs good foward and reverse i just have no power 5mph each way… read more
Captain Dave
Captain Dave
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We have twin mercruiser 454 block engines. my max rpm readings
We have twin mercruiser 454 block engines. my max rpm readings are 2800. We do have new tachs. However, I am told the max rpm for this engine shoul be around 4000 rpm. Nay suggestions? david hoffmeyer… read more
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Captain Dave
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Hi I have a 1979 cobalt w/mercruiser 260 issues with the shifter after
Hi I have a 1979 cobalt w/mercruiser 260 issues with the shifter: after two days of nice boating with some idling problems (would conk out when in neutral or slow speed) I can start in neutral and rev… read more
Master Tech
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I have twin 5.7 Mercruiser I/Os with Bravo II outdrives.
I have twin 5.7 Mercruiser I/O's with Bravo II outdrives. I am having trouble with the engines stalling while cruising at low speed. Once an engine stalls, it will not always immediately restart. I ha… read more
TOM
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I have two 81S mercruiser inboard motors in a sport cruiser
I have two 8'1S mercruiser inboard motors in a sport cruiser 36' and I think I have injector problems. Can I run some concentrated gas with techtron in it and if so what is the max concentration I can… read more
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I have a 1999 Sea Ray. I took it out and when it got up to ...
I have a 1999 Sea Ray. I took it out and when it got up to 3000rpm( the point where the boat plains it died. Any suggestions on this?39648.8998562153… read more
Pappy's Sales and Service
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I have a 3.0L Mercruiser marine engine in my boat...it ...
I have a 3.0L Mercruiser marine engine in my boat...it starts easily enough but when I put it into drive (forward) it usually backfire and stalls unles it is at a very low speed/rpm. It revs high in n… read more
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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