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3500 RPM 10 miles pr hour. Last 4700 RPM and 37 MPH. Motor
3500 RPM 10 miles pr hour. Last 4700 RPM and 37 MPH. Motor has been serviced twice, motor jack plate installed to raised motor six inches. no water in the back of the boat. New stainless steal prop … read more
Jason
Jason
Marine Mechanic
18,647 satisfied customers
I was working with about two months ago. I have advanced the
I was working with Jason about two months ago. I have advanced the timing on both port and starboard motors to 15 degrees (actually 18 ). The port motor now runs a lot better and can make the boat pla… read more
Jason
Jason
Marine Mechanic
18,647 satisfied customers
I have a 1996 Bayliner Classic 2452 with a 5.0L Mercruiser
I have a 1996 Bayliner Classic 2452 with a 5.0L Mercruiser I/O (motor 2008) when I put the boat in the water this year my top speed was 41 mph, as time went on i noticed a drop in speed and RPM's woul… read more
Jason
Jason
Marine Mechanic
18,647 satisfied customers
MY Mercury OT757204 4 stroke motor is running rough and won't
MY Mercury OT757204 4 stroke motor is running rough and won't run at RPM's over 2000 (It revs up on its own to about 4500 and then goes back down to around 1500-2000) I have changed the Boat filter an… read more
Jason
Jason
Marine Mechanic
18,647 satisfied customers
I have 1998 295 with same year 200 hp mercury . What prop do
I have 1998 295 with same year 200 hp mercury . What prop do you recommend and how far from the bottom of the pad… read more
Charles
Charles
Certified Mercury Tech
5,078 satisfied customers
Oldnewengland, I just dont know ... the engine is running
Oldnewengland, I just don't know ... the engine is running great at idle and up to around 3200 rpm's ... I'm not sure about the rpm's because the tack had to be disconnected, the engine was breaking u… read more
Jason
Jason
Marine Mechanic
18,647 satisfied customers
Jim Just got back from our lake over the weekend and checked
Jim: Just got back from our lake over the weekend and checked new spark plugs installed by lake mechanic. They are NGK-R PZTR5A15 gapped to approx .060. The plate stamped on both engines calls for a D… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
4,094 satisfied customers
I own a 2008 Larson Cabrio 274, a 28 foot cruiser weighing
I own a 2008 Larson Cabrio 274, a 28 foot cruiser weighing 6000 lbs. It is powered by a Volvo 320 up I/O. I have had problems where frequently it will only go to about 3500 rpm and 10 mph with the thr… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a Mercury 115 HP outboard on a 2005 Tahoe 195 deckboat.
I have a Mercury 115 HP outboard on a 2005 Tahoe 195 deckboat. The motor has about 240 hours on it and has always run well until last week when this problem came up all of the sudden. The boat starts … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I need help right now if anyone can please!! I asked a technician
I need help right now if anyone can please!! I asked a technician here if the carbs on a yamaha c90TLRY needed to be rebuilt due to engine not getting over 3,500 rpm and i just did everything to spec … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
my 2000 evinrude 225 ficht ram injection motor is cutting out
my 2000 evinrude 225 ficht ram injection motor is cutting out or bogging down around 3500-4200 rpm, depending on trim to motor, oil is now leeking out of the six ports on the boat side of the engine, … read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
I HAVE A 04 OX 66 200 AND IT HAS A 23M PROP I WOULD LIKE TO
I HAVE A 04 OX 66 200 AND IT HAS A 23M PROP I WOULD LIKE TO KNOW WHICH WAY TO GO WITH THE PROP FOR SOME MORE SPEED? IT IS AROCKET OUT OF THE HOLE AND PULLS SKIERS AND TUBE WITH THE 23M PROP… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,729 satisfied customers
i have a evinrude 200 xp professionaly rebuilt about 40hrs
i have a evinrude 200 xp professionaly rebuilt about 40hrs ago which was 6 yrs ago due to work schedule , it runs at idle fine but when i puit it under load to get on plane it has a sikip and loses po… read more
Master Tech
Master Tech
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Vocational, Technical or Trade Scho
1,167 satisfied customers
i have a 1989 340DA sea ray with twin 7.4 carb. while out
i have a 1989 340DA sea ray with twin 7.4 carb. while out on the boat last night.. about 40 mins into the cruise heard a "bump" behind myself (starboard engine) sounded like someone closing a cabinet.… read more
capt ron 1959
capt ron 1959
Owner/Marine Mechanic
Vocational, Technical or Trade Scho
348 satisfied customers
Yamaha Exciter Boat 1998 270hp model. The motors shut off once
Yamaha Exciter Boat 1998 270hp model. The motors shut off once boat reaches speeds excess of 40 mph or 5500 rpm. It will pull out of the hole at full throttle and will run all day at 25 mph or less th… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
my yamaha LZ250TXRB outboard loses power at about 3500 rpms.
my yamaha LZ250TXRB outboard loses power at about 3500 rpms. i have drained all fuel, changed all fuel filters and cleaned water seperaters. any clues to what the problem might be?… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
Hi, I have a 2004 Mercury 115hp 4-stroke EFI outboard, when
Hi, I have a 2004 Mercury 115hp 4-stroke EFI outboard, when i rev the engine on neutral sounds fine and will rev up till rev limiter, but in gear or under load, it will start bogging past 3500 rpm and… read more
TOM
TOM
Vocational, Technical or Trade Scho
196 satisfied customers
1986 Cajun Boat with 150 HP Evinrude OB Jerry Fox Derby
1986 Cajun Boat with 150 HP Evinrude OB Jerry Fox Derby Kansas XXX-XXX-XXXX Purchased January 2007 Ran in the drive way with Muffs and idled OK, a little rough at about 800-900 RPM Memorial Day Weeken… read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
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Meet the Experts:

Dominick

Dominick

Marine Mechanic

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

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Ted G.

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John White

John White

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Jason

Jason

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Degree in Marine Technology. Gas and diesel marine mechanic.

Tan

Tan

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Jeff G.

Jeff G.

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Captain Dave

Captain Dave

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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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