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2008 Merc 6.2 MX MPI Starboard Engine is reaching 4000 rpm
2008 Merc 6.2 MX MPI Starboard Engine is reaching 4000 rpm WOT, Port Engine is reaching 4500 WOT (close to spec). Props tuned, filters clean. Fuel Pressure at rail Schrader valve is 40psi at idle for … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade Scho
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1999 Mercruiser 350 mag mpi. Starts great, revs ok, but
1999 Mercruiser 350 mag mpi. Starts great, revs ok, but under load bogs and sputters around 2500 rpm. Will not exceed 4000 rpm. Backfires as well. $4500 deep so far with no improvement. Swapped every … read more
Jason
Jason
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I have a 2005 Mercury Optimax 115 Salt Water that keeps alarming
I have a 2005 Mercury Optimax 115 Salt Water that keeps alarming under a load approaching 4000 rpm… read more
Charles
Charles
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I recently purchased a boat with a 98 Suzuki DT 225HP
Hello, I recently purchased a boat with a 98 Suzuki DT 225HP motor on it. The first thing I had done was have a 100 hour service on it since it had not been run in over a year. After that took it out … read more
Charles
Charles
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I have a pair of 5.0 mpis can not get engines past 4000. rpms
I have a pair of 5.0 mpis can not get engines past 4000. rpms under load no miss fires felt. props are good bottom not fauled.… read more
Joe
Joe
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2003 Mercury 115 HP EFI Four-stroke, Saltwater, serial number
2003 Mercury 115 HP EFI Four-stroke, Saltwater, serial number # XXXXX Ran fine until I pulled another boat, now it will not run above 4000 rpm under load (in gear). Seems guardian mode kicked in and i… read more
Charles
Charles
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I have a ticking noise coming from my Volvo pinta 5.7 gsi
I have a ticking noise coming from my Volvo pinta 5.7 gsi motor only under load starts at about 2100 rpms !!!… read more
Tan
Tan
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I have a 2005 sea ray 260 that I purchased new. It has a merc
I have a 2005 sea ray 260 that I purchased new. It has a merc 6.2 horizon bravo three drive with 350 hours. The boat has always been in fresh water. Boat has new impeller every two years. The past thr… read more
orcamarine
orcamarine
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I have a 2006 Regal 2200 with the Volvo 5.0GXI-E i just purchased.
I have a 2006 Regal 2200 with the Volvo 5.0GXI-E i just purchased. The engine has 100 hours on it. When running down the lake at 3/4 throttle, I am getting about 4000 RPM, without changing the throttl… read more
Whitecap36
Whitecap36
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i have 1998 vourwinds with a volva penta with a 5.80 gi when
i have 1998 vourwinds with a volva penta with a 5.80 gi when i am running below 4000 rpm the engine runs fine but when i go above to 4500 rpms with in a minute or two the engine acts like it ran out o… read more
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Honda BF45 I have a Honda 45 hp four stroke on an Arima 1511
I have a Honda 45 hp four stroke on an Arima 1511 Sea Chaser that has been giving me nothing but problems for the past two months. It all started when I took it out for a ride at the beginning of July… read more
Jeremy R.
Jeremy R.
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Hi, I have a 30 Doral with 2 4.3lx V6 and 2 sets of propellers the
Hi, I have a 30' Doral with 2 4.3lx V6 and 2 sets of propellers the 1st set lets me cruise around 3900 rpm and can attain wot at 4800 rpm the 2nd set lets me cruise around 3200 rpm and cannot attain t… read more
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Jason
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Have a 1991 200BR SeaRay with 4.3LX V6 Mercuiser inboard/outboard.
Have a 1991 200BR SeaRay with 4.3LX V6 Mercuiser inboard/outboard. Ran great till yesterday, running at 4000rpm, throttled down to 1500rpm, after a minute, motor stuttered and stalled, won't restart a… read more
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I have a Fisher 200 Freedom Fish pontoon boat with a Merc 50hp,
I have a Fisher 200 Freedom Fish pontoon boat with a Merc 50hp, 4cyl, 4 stroke outboard. Both are 1996 vintage. I need a new prop. The current prop is 10.5" dia with about a 11" pitch. It has always e… read more
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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I have a 2002 F115 I recently took it out Albacore fishing
I have a 2002 F115 I recently took it out Albacore fishing and put 90 miles on it that day. On the way out the engine ran great but on the way in the engine started sounded funny and I could not get p… read more
ROCKET
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I have a 1998 regal commodore 2750, volvo 7.4 GL 4bbl holley
I have a 1998 regal commodore 2750, volvo 7.4 GL 4bbl holley carb, 200 engine hours, volvo penta duo prop. Engine and power are fine below 4000 rpm. Above 4000 rpm the engine rpm drops and then tries … read more
Pappy's Sales and Service
Pappy's Sales and Service
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586 satisfied customers
1983 125 force 135 compression on all cyl,s frsh gas/oil ...
1983 125 force 135 compression on all cyl,s frsh gas/oil mix 50:1 clean rebuilt carbs professionally done by a mechanic. 4000 rpms all she will do wot. 30 min. @ 3500 rpm consumed 5 gal gas fires up a… 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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