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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
Certified Mercury Tech
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I have a 2 stroke 150, 3 carb outboard 2005. just noticed
I have a 2 stroke 150, 3 carb outboard 2005. just noticed rpm gauge on helm was showing 5000 rpm at idle but outboard seemed to be operating at normal rpms. any ideas on cause?… read more
Tan
Tan
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Certified Marine Technician
11,406 satisfied customers
2005 SX 195, Mercruiser 5.0L, tachometer is stuck at 1200
2005 SX 195, Mercruiser 5.0L, tachometer is stuck at 1200 rpm mark. What is possible solution for repair? Gregg… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have a 1998 seventy horse, two-cycle motor and it runs very
I have a 1998 seventy horse, two-cycle motor and it runs very rough over about 3,500 RPMs. And the tachometer is constantly maxed out even when the motor is running at idle speed.… read more
Tan
Tan
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I have bayliner with a Mercruiser Alpha one 3.0LX 1996 Serial
I have bayliner with a Mercruiser Alpha one 3.0LX 1996 Serial OF880251. After winterizing last year, the unit will not reach rated speed with maximum RPM. With 4000 RPM, the speed is 28 MPH. I have ch… read more
dieselhub
dieselhub
39 satisfied customers
I have a 2004 Searay SD200 with a 5.0L Mercury fuel injection,
I have a 2004 Searay SD200 with a 5.0L Mercury fuel injection, alpha stern drive, with about 350 hours on the engine. Never had a problem until this morning after a couple of fabulous water skiing run… read more
Jason
Jason
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Vocational, Technical or Trade School
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I have 2 1990 Mariner 200 carbuerated motors on my boat. Cruising
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Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I have a 16 ft. aluminum Legend fishing boat (side console).
I have a 16 ft. aluminum Legend fishing boat (side console). The hull Weight is 640 lbs. Maximum capacity is 1,220 lbs. The outboard engine is 25 HP EFI 4-Stroke. The engine's full throttle RPM range … read more
Jason
Jason
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Vocational, Technical or Trade School
18,955 satisfied customers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers
I have a 1998 Searay 290DA Sundancer with twin - 5.0 EFI Mercruisers and Alpha one drives The boat has 310 hours on it and had been used very little before I purchased it in 2008 For the past several … read more
Ted G.
Ted G.
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Bought a Sea Sprite 225 Cuddy...doesnt want to plane. in larger
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K. Kergan
K. Kergan
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Vocational, Technical or Trade Scho
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I have a 22 Cadorette Sport Cuddy with Mercruiser 350 Magnum.
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James
James
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Vocational, Technical or Trade Scho
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I just purchased a 90 HP Mercury Optimax and I put it on a
I just purchased a 90 HP Mercury Optimax and I put it on a Lowe Roughneck 18.5 Aluminum boat. At high speeds, I am getting a beeping sound which according to the manual indicates my RPMs are getting t… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a mercruiser 5.0 engine with a bravo ll outdrive. Which
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Kenny
Kenny
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I have a 2003 25ft Mustang Sports Cruiser fitted with a 4.3
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Scott Martin
Scott Martin
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we have a 2004 bennington pontoon with a mercruiser 115 hp
we have a 2004 bennington pontoon with a mercruiser 115 hp efi outboard. today we notcied the tach was reading 6000 rpm (i really don't think the motor was reving @ 6000) and it ran more like a speed … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Need a new prop, current one is dinged. It is a aluminum 14.25
Need a new prop, current one is dinged. It is a aluminum 14.25 x 21. The engine is a mercruiser 1999, 5.0L, V-8, with an Alpha-one, I have no idea of gear size. Boat is a Larson 2000 22' bowrider. On … read more
Captain Dave
Captain Dave
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Master's Degree
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i have a 87 eliminator mojave 21ft it has a 1991 350 mag motor
i have a 87 eliminator mojave 21ft it has a 1991 350 mag motor alpha ono gen one outdrive the prop thats one the boat is a mercury mirage plus stainless 19 pitch 15 1/4 diameter and top speed is about… read more
Master Tech
Master Tech
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Vocational, Technical or Trade Scho
1,167 satisfied customers
Have a 2002 Cruisers Yachts 3275 with twin Mercruiser 5.0L
Have a 2002 Cruisers Yachts 3275 with twin Mercruiser 5.0L MPI Alpha's. The port engine will stall when it has a load on it over 2400 RPM's. It sends no engine trouble light ot tone and shows no fault… read more
capt ron 1959
capt ron 1959
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

1,242 satisfied customers

40 years boating, Safe boating instruct., Offshore Race promoter, Failure Analysis, Expert Witness

Dominick

Dominick

Marine Mechanic

1,009 satisfied customers

25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified

John White

John White

Marine Mechanic

306 satisfied customers

11 years experience working on outboards, inboards, sterndrives & pwcs

Jason

Jason

Marine Mechanic

18,955 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,406 satisfied customers

40 yrs. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician.

Jeff G.

Jeff G.

Marine Mechanic

4,730 satisfied customers

42 years experience, Certified Master Technician, All Major Outboards, Sterndrives, Hi-Performance

Captain Dave

Captain Dave

Marine Mechanic

2,672 satisfied customers

USCG Licensed Captain, 20+ Years Boating, Fishing, Maintenance and Repair Experience

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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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