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I have a 2002 Yamaha 250 HPDI This unit idols well
I have a 2002 Yamaha 250 HPDI This unit idols well low-pressure fuel steady at 50 high-pressure idling about 980 when I'd pull it up on a plane the high-pressure fuel drops down to about 200 psi low p… read more
Jason
Jason
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Vocational, Technical or Trade Scho
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My 1994 idles roughly and it seems to throttle up OK but
My 1994 idles roughly and it seems to throttle up OK but just add an idol it will idle rough what do you think could be wrong it's a 750 mL Polaris liquid triple … read more
RSRBOB
RSRBOB
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Yamaha HPDI 200 just coming off winter storage. started rough
Yamaha HPDI 200 just coming off winter storage. started rough and would not idle. I put it in gear and ran at 3500-5000 rpm for 3 or minutes. Now it idles very high at 1500-2000 rpm. Why?… read more
Charles
Charles
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I have a 2004 VZ 225 hpdi very slow out of hole an only 5100
I have a 2004 VZ 225 hpdi very slow out of hole an only 5100 rpm top end. All filters where changed last fall. 50 psi to high pressure pump. I borrowed another pump from a friend an it still does the … read more
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Jason
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2008 yamaha 250 hpdi - 1000 hoursStarted having problems
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Ted G.
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i hav a 200hp yamaha out board. it idels perfectly and starts
i hav a 200hp yamaha out board. it idels perfectly and starts first go...but will not rev past 2000 revs. when motor lifted out of water it will rev freely..unsure of problem… read more
Charles
Charles
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Yamaha 40 hp 40ELK: I have a question for a marine tech. I
I have a question for a marine tech. I have a 1985 40 hp (40ELK) Yamaha that idles really rough. I have cleaned the carbs and replaced the float needle valves. It has a new CDI unit. I like to troll a… read more
Jason
Jason
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I have a 2003 Yamaha hpdi vmax 200hp that stopped running while
I have a 2003 Yamaha hpdi vmax 200hp that stopped running while coming out of a hole shot. Engine would not start but would crank. After getting cover off found a blown 20 amp fuse servicing the cdi, … read more
Jason
Jason
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1.) Have a 2005 VZ250TLRD / HPDI YAMAHA and it had a cylinder
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I need to replace my ECU (60V-8591-00-00) on my 2003 Yamaha
I need to replace my ECU (60V-8591-00-00) on my 2003 Yamaha (Z250TURB) 250hp HPDI outboard. They have 2 new updates to this ECU: 60V-8591-01 and 02. New ones are $1350 and I have found a used one for … read more
orcamarine
orcamarine
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1986 Yamaha 115 - new fuel pump, carb rebuild with exact adjustment
1986 Yamaha 115 - new fuel pump, carb rebuild with exact adjustment on floats (5/8") and pilot screws (5/8 turn out), reed valves intact, dang thing will not idle. Starts fine, but even fairly warm af… read more
orcamarine
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Im looking at a used yamaha 80 hp 4 stroke carburated outboard
Im looking at a used yamaha 80 hp 4 stroke carburated outboard (2001). I asked about the compression on it and was told it was 120 to 130. Is this too low or does it have a lot of hours of use left? A… read more
James
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I am purchasing a 2002 yamaha 200 hpdi I had ten do a compression
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Tan
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I have a yamaha WR500f Waverunner. When cold, the engine will
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RSRBOB
RSRBOB
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I have a Yamaha Optimax 250. Today is the first time I have
I have a Yamaha Optimax 250. Today is the first time I have taken it out since Nov of 2009. My co owner left the tank full but did not put stabilizer in it. I drained the tank, added new fuel and Stab… read more
Jeremy R.
Jeremy R.
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have 250 hpdi 2003 100hrs #2 hole in it, heard about the problems.
have 250 hpdi 2003 100hrs #2 hole in it, heard about the problems. Should I get a powerhead, will I still have the same problems?… read more
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I have a 1995 Mariner 90 HP. Starts hard, idles rough, and
I have a 1995 Mariner 90 HP. Starts hard, idles rough, and pops. #1 cyl. has dry soot buildup after only minutes of running. All cyl. have good fire. When removing spark plug immediately after running… read more
Mechman45
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RSRBOB, Dan with the Yamaha xlt1200 2001 still having problems,
RSRBOB, Dan with the Yamaha xlt1200 2001 still having problems, fixed catalyst,ski is bogging down at 15miles hour then starts going till 35miles hour thats all it will do, it did go 55, no warning li… read more
RSRBOB
RSRBOB
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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

Ted G.

Ted G.

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John White

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Jason

Jason

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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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