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I, I have a 2001 50 Hp. Yamaha 2 stroke. I idles fine and
I have a 2001 50 Hp. Yamaha 2 stroke. I idles fine and cranks with ease. On the hose I can run it up to full RPM, but in the water (under a load) it will " bog down". For while it would bog a little and then pick up an run normal. Over time it has progressed to the point now that it will not pick up at all. I can still manually run up the RPM on the throttle in neutral. I have change the fuel tank,, hose, fuel pump, plugs and pulled the top carb bowl to look for trash or gunk. Clean as a whistle. The local shop says they have never sold a power pack for this model. Where do I go from here? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,013 satisfied customers
My 1981 140 is slow to start, also wont rev over 1400 rpm
My 1981 140 is slow to start, also wont rev over 1400 rpm with the hand throttle while idling in nuetral. … read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
Hello, I have a 2002 Volvo Penta 4.3gl. 320 hours on the
Hello, I have a 2002 Volvo Penta 4.3gl. 320 hours on the motor and serviced by volvo penta dealer since purchase new in 2003. At High RPM, two issues occur. 1) adjusting the power trim cause the engin… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,013 satisfied customers
I have a 2003 johnson j90plsr 2 stroke. last few time out it
I have a 2003 johnson j90plsr 2 stroke. last few time out it has started to bog down and not run at wot. only reaches 4000 rpm. changed fuel filter on inlet and also ran some carb cleaner spray throug… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
2004 50 hp johnson. engine ran fine most of the day. when returning
2004 50 hp johnson. engine ran fine most of the day. when returning to the dock i tried to get boat on plane. It wouldnt give me the throttle power or rpms to do it. wondering what i should check.… read more
Jason
Jason
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Vocational, Technical or Trade School
24,013 satisfied customers
so i have s 1997 Johnson Fisht 150 Fast Strike. My motor starts
so i have s 1997 Johnson Fisht 150 Fast Strike. My motor starts fine and idles fine but when i run wide open im only at 4000 rpm. stock prop but i ordered a 21 pitch stainless. what would cause this? … read more
Tan
Tan
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We have a 2009 Sea Ray 205 Sport with Mercury 5.0L TKS with
We have a 2009 Sea Ray 205 Sport with Mercury 5.0L TKS with 105 hours as of 7/21/12. About 2 weeks ago, the engine sound changed slightly and it sounds as if there is an exhaust leak or something. No … read more
orcamarine
orcamarine
Proprietor
Vocational, Technical or Trade Scho
7 satisfied customers
I have a 2003 Johnson 140HP 4 Stroke that wont go above 2700
I have a 2003 Johnson 140HP 4 Stroke that won't go above 2700 RPM. I can't get the boat on plane. This is the first time this has happened. I also was wondering if the throttle cable could affect this… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I asked this question a couple of weeks ago, however you said
I asked this question a couple of weeks ago, however you said I needed more info. I wantg to know the recommended pitch for a 2003 Mercruiser, MCM4.2LT, idle neutral = 4400 -4800 rpm, VIN(NNN) NNN-NNN… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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I HAVE A MERCURY 9.9 MLA4ST 1996 SN 0H005430 WITH A PROPELLER
I HAVE A MERCURY 9.9 MLA4ST 1996 SN 0H005430 WITH A PROPELLER 48-828-156-0 ON A LUND WC14 BOAT. THE PROBLEM IS THAT IT WILL NOT BRING THE BOAT TO PLANE WITH EVEN 1 200LB PERSON. I HAVE HAD OTHER 14FT … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,013 satisfied customers
2003 johnson 90hp 2 stroke misfires under load. model #j90plstc.
2003 johnson 90hp 2 stroke misfires under load. model #j90plstc. Boat has perfect compression and what looks like a great spark on each cylinder when put clear spark tester on. New fuel water seperato… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I have a 1999 Johnson J50PLEE outboard. The motor sat (on
I have a 1999 Johnson J50PLEE outboard. The motor sat (on a covered and garaged boat) for 3 or 4 years. I recently changed the gas, cleaned the carbs, and took it for a ride. Everything worked fine fo… read more
Jason
Jason
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Vocational, Technical or Trade School
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i have a 28 hp johnson outboard motor that will not run at
i have a 28 hp johnson outboard motor that will not run at full throttle it idles great.i cleaned the carb twice and high speed jet.I changed supply hose and tank but it still wont run at full throttl… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
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Just recently seen a drop in RPM on my 2003 Maxum 5.7 liter
Just recently seen a drop in RPM on my 2003 Maxum 5.7 liter mercuriser (carb). the boat been running fine with RPMs ranging from 4200 cruising not full throttle to 4800 with wide open throttle (WOT). … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
24,013 satisfied customers
My yamaha 2005 115 four stroke started idling rough about 4
My yamaha 2005 115 four stroke started idling rough about 4 weeks ago. Sometimes it would miss while running full throttle. Just last week it cranked fine in the morning, but almost didn't crank after… read more
Whitecap36
Whitecap36
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i have a johnson bombadire 70 4 stroke 2004 and it miss fires
i have a johnson bombadire 70 4 stroke 2004 and it miss fires and will not rev flat out it starts fine and you dont feel like it will actually stop running i was thinking of starting with the spark pl… read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
I have a 225 Hp Johnson 1999 that idles fine at 850 neutral
I have a 225 Hp Johnson 1999 that idles fine at 850 neutral 700 in gear, comes up good until 3000 rpm and almost on plane then bogs down to 2200 and will not plane.… read more
davesoutboard
davesoutboard
owner
Associate Degree
1,570 satisfied customers
What prop should I use on a 4 stroke Johnson 30 HP outboard
What prop should I use on a 4 stroke Johnson 30 HP outboard motor at 6,000 ft elevation? It is a 2005 outboard model.… read more
davesoutboard
davesoutboard
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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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