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Merc 40hp 4 stroke won't start. motior has less than 20 hrs.
merc 40hp 4 stroke won't start. motior has less than 20 hrs. laid up for 9 months … read more
Charles
Charles
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We have replaced the fuel pump and the fuel line and the
We have replaced the fuel pump and the fuel line and the fuel filter. We have a Mercury 40 hp 4 stroke efi engine. It will start but not run, runs rough and then dies also, we put in new spark plugs … read more
Tyler
Tyler
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2004 60 HP EFI 4 stroke. Runs great until I throttle all the
2004 60 HP EFI 4 stroke. Runs great until I throttle all the way up. will run for 2 - 3 minutes then it dogs out. Sounds like it is starving for fuel. I have replaced both fuel filters, both fuel pump… read more
Yachtwork
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2006 75 HP 4 stroke EFI. Hesitation when throttle up between
2006 75 HP 4 stroke EFI. Hesitation when throttle up between 1000 and 2000 RPM, only when sitting for week. Idles and starts fine. after several hesitations, runs fine at 4-5000 Rpm. Gas or electric p… read more
Jason
Jason
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40 hp 4 stroke. It starts and runs. idles rough and if you
Hi. 40 hp 4 stroke. It starts and runs. idles rough and if you accelerate, it dies. … read more
Noel Schembri
Noel Schembri
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We have a 2006 Mercury EFI 4-stroke. We are not getting fuel
We have a 2006 Mercury EFI 4-stroke. We are not getting fuel from the tank to the outboard. If we squeeze the primer ball on the fuel line it fills the fuel filter cup, we start the engine and let it … read more
Charles
Charles
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I have a 50 hp four stroke suzuki outboard. It has a 12 pitch
I have a 50 hp four stroke suzuki outboard. It has a 12 pitch prop that at wot will turn just over 6000 rpm's. The last time out the wot was only about 5400 rpm's and with out changing the throttle th… read more
orcamarine
orcamarine
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I have 2004 50 HP EFI Big Foot the engine starts but starts
I have 2004 50 HP EFI Big Foot the engine starts but starts to run rough after a few seconds. After advancing the throttle, the RPMs vary at a constant interval between 1000 and 3500. The boat sat mos… read more
MRYZ450F
MRYZ450F
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I have a 09 mercury 75 HP EFI 4 stroke motor . First time out
I have a 09 mercury 75 HP EFI 4 stroke motor . First time out last year the motor wouldn't start had to have a new fuel pump.This motor has very little hours on it.Three days ago we went first time th… read more
James
James
Certified Marine Mechanic
Vocational, Technical or Trade Scho
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My 70 hp outboard runs OK up to 2500 rpm and then if you try
My 70 hp outboard runs OK up to 2500 rpm and then if you try to push it over that it sputters at 3000 and then will run up to 4500 for a second or two and then back down to 3000. If you back off to 25… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
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I have a 2005 Mercury outboard 4 stroke. When the motor starts
I have a 2005 Mercury outboard 4 stroke. When the motor starts and idles no problems but when i am cruising and give it more throttle it sputters. Going slow no problems with fuel. I did not use the b… read more
Jeff G.
Jeff G.
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Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 2010 mercury 50 HP EFI 4 stroke 4cyl outboard. It
I have a 2010 mercury 50 HP EFI 4 stroke 4cyl outboard. It has about 10 hours on it, so I know it is under warranty but still want to know. I was out on the boat today and the engine cut out and died … read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
I have a 2001 Yamaha 225 hp 2 stroke fuel & oil infected OX66
I have a 2001 Yamaha 225 hp 2 stroke fuel & oil infected OX66 Saltwater Series motor. My problem is there is no power. Motor starts fine, idles fine, but when I throttle up it goes up to 5000 then die… read more
Jeremy R.
Jeremy R.
5,362 satisfied customers
2005 Mercury outboard 60 hp 4 stroke EFI big foot experiences
2005 Mercury outboard 60 hp 4 stroke EFI big foot experiences faltering and stalling. We have installed OEM mech. fuel pump, elec. fuel pump, new fuel tank, and squeeze primer bulb and ethanol proof f… read more
Tan
Tan
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Merc Outboard 2 stroke 1998 200HP EFI part number 8140122
Merc Outboard 2 stroke 1998 200HP EFI part number(NNN) NNN-NNNNis listed as NLA, can I substitute another part , as I cannot find one?? Thanks, Jim [email protected]… read more
Jeff G.
Jeff G.
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I have a 2002 Mercury 60 hp 4 stroke EFI Bigfoot. This weekend
I have a 2002 Mercury 60 hp 4 stroke EFI Bigfoot. This weekend it started to stall and I backed off the throttle and limped back to the dock. There is fuel coming from the bottom of the cowl where the… read more
Captain Dave
Captain Dave
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Master's Degree
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I have a 1999 Yamaha 200 hp outboard. Starts and idles fine,
I have a 1999 Yamaha 200 hp outboard. Starts and idles fine, but will only run on a plane for a couple of minutes before it dies. When it dies, it just dies, no hesitation no miss nothing. It will res… read more
ROCKET
ROCKET
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426 satisfied customers
2006 Mercury 115 hp outboard motor, runs good for a while then
2006 Mercury 115 hp outboard motor, runs good for a while then starts sputtering, losing power then sometimes cuts off while cruising. Seems to get worse the faster you run it. Took it in for service … read more
ROCKET
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Jeff G.

Jeff G.

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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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