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I have a 2013 sun tracker pontoon with a 90 hp 4- stroke
I have a 2013 sun tracker pontoon with a 90 hp 4- stroke when I get to about 4500 rpms it starts beeping n cuts the power until I go to 4000 rpms n will run fine there all day I've changed both fuel f… read more
Jason
Jason
Marine Mechanic
23,303 satisfied customers
After a oil change the engines top out at 2500 rpm under
After a oil change the engines top out at 2500 rpm under load. In neutral they easily go up to 4000 They engines have been checked On computer & are fine. Have been told a low oil sensor could cause p… read more
Jason
Jason
Marine Mechanic
23,303 satisfied customers
At full throttle boat will only make 3500 rpm. Engine sounds
At full throttle boat will only make 3500 rpm. Engine sounds fine. Put it full throttle in neutral same thing. Took her out one week ago no problem. Engine is mercruiser I/O 5.0 260 hp… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Im told by the boat yard that the ECU on my 2000 Merc Optimax
I'm told by the boat yard that the ECU on my 2000 Merc Optimax 115HP needs to be replaced...they put the 'computer' on it to discover this diagnosis. With the age of the engine I don't think it is wor… read more
Jason
Jason
Marine Mechanic
23,303 satisfied customers
2004 Mercruiser 5 liter MPI, 260 HP, approx 275 total hrs.
2004 Mercruiser 5 liter MPI, 260 HP, approx 275 total hrs. Intermittent alarm sounding. Manual indicates lower gear oil. Reservoir filled to fill line. Engine also immediately started stalling at low … read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2006 202 hurricane deck boat with the 5.0. As we
I have a 2006 202 hurricane deck boat with the 5.0. As we were riding around today the beeping alarm came on and it beeps every 2 seconds. We shut off the engine and messed with things but its very ha… read more
Jason
Jason
Marine Mechanic
23,303 satisfied customers
I have an optimax pro xs 115 on my 25 ft pontoon boat. After
I have an optimax pro xs 115 on my 25 ft pontoon boat. After running the boat at 4500 rpm for a couple of minutes alarm will sound and motor will turn off. I had never had it happen before but my son … read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
Hello, I have a Mercruiser MPI 350. I have had a problem with
Hello, I have a Mercruiser MPI 350. I have had a problem with the alarm coming on while at cruising speed. It will lose power, so I cut it to neutral and it goes off. However, I can not ever give it t… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1987 Mercruiser 5.7L 260 HP with Alpha 1 drive unit.
I have a 1987 Mercruiser 5.7L 260 HP with Alpha 1 drive unit. It runs great, but at 3200 RPM the engine disengages and RPMs kick up to around 4000 RPM and I usually have to go back to neutral to re-en… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1997 Larson, with a 4.3 LX Gen+ Mercruiser. The boat
I have a 1997 Larson, with a 4.3 LX Gen+ Mercruiser. The boat sat for three years and I had a shop go through the boat and the replaced various items. They replaced the fuel pump and put a new carbura… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
My 26 Bayliner, 2007 with a Mercruser 5.0 MPI I suspect I
My 26' Bayliner, 2007 with a Mercruser 5.0 MPI I suspect I Have a problem with the guardian system, when I turn the ignition key on the horn sounds for about 4 seconds and goes off even before I start… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I have a 2000 Mercruiser 5.0 EFI in a Sea-Ray 210 with 350
I have a 2000 Mercruiser 5.0 EFI in a Sea-Ray 210 with 350 hours on it. On Saturday I was on Lake Michigan and as soon as I got out of the no-wake zone and went full throttle, the boat didn't seem to … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
boat will start and run fine. shut it off after it is warmed
boat will start and run fine. shut it off after it is warmed up and it will resart, then begin to run erattically, going to high and low rpm and the alarm will sound. the boat shuts off and will not r… read more
Joe
Joe
Owner Kingsland Auto & Marine Services
Vocational, Technical or Trade Scho
1,396 satisfied customers
over throttle (5000 rpm) smartcraft system. Everything in
over throttle (5000 rpm) smartcraft system. Everything in check now but alarm beeps twice every minute system is in gear. How do I reset the smartcraft system. I tried removing the positive terminal o… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 1984 Mercury 200 HP, 6 cyl that will intermitently
I have a 1984 Mercury 200 HP, 6 cyl that will intermitently only reach 2000 RPM, or 4000 RPM. The limiting RPM seems to vary but it will start fine , idle fine and when working, work fine for weeks at… read more
Marc C. Albertson
Marc C. Albertson
Chief Service Technician
Vocational, Technical or Trade Scho
56 satisfied customers
engine is running 200 revs down.3800 not 4000 flat out.1.7D mercruiser 2005/2006
Engine revs have dropped by 200 flat out.we cruise at 3000/3200 but when flat out occassionally it always went up to 4000 revs.Does not seem to affect 3000/3200 range.Think it fuel filter.Water separa… read more
Jason Forsberg
Jason Forsberg
Outboard Marine Mechanic
Vocational, Technical or Trade Scho
531 satisfied customers
i have a 275 sea ray (260da) powered by a 5.0 l 260 hp mpi
i have a 275 sea ray = (260da) powered by a 5.0 l 260 hp mpi on a b3 leg ,fuel consumption 55 lt- 60 lt an hour 4000 rpm with a boat speed of 25 kn Q. Is this a standard consumption rate or do i have … read more
Dominick
Dominick
Marine Mechanic
Vocational, Technical or Trade Scho
1,009 satisfied customers
I have a 1999 Sea Ray 210 with a 5.0 Mercruiser I/O. The
"I have a 1999 Sea Ray 210 with a 5.0 Mercruiser I/O. The boat is a cream puff, only 170 hrs on it. Original owner put 150 hours. Over the season it started to run poor, over time, stumble, and lose p… read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
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Meet the Experts:

Ted G.

Ted G.

Rigger, Diagnostician

3,148 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

23,303 satisfied customers

Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

MerCruiser Certified Technician

11,409 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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