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I bought Yamaha 90 HP 4 stroke engine 9 yrs ago and VERY
I bought Yamaha 90 HP 4 stroke engine 9 yrs ago and VERY Satisfied. Just had boat dewinterized and tried to lower engine to start and motor would NOT lower either on handle or engine switch. What is the fix please ???? … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Motor ran fine for about 5 minutes, then slowly lost power
motor ran fine for about 5 minutes, then slowly lost power and shut down. I'm thinking it is the water pump. I changed the fuel filter and cranked the motor using the ears and let it run for about 30 … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
2007 Mercury 90 HP 4 stroke outboard. Tilt switch in
2007 Mercury 90 HP 4 stroke outboard. Tilt switch in throttle handle will only lower the motor, not raise it. The switch on the motor itself raises and lowers it with no problem. I have checked all th… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
2013 90 hp 4 stroke Yamaha will tilt up and down except if
2013 90 hp 4 stroke Yamaha will tilt up and down except if raised all the way to its limit. It then has to be lowered by opening the screw to release the pressure and lowered manually. If engine isn't… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
My trip on my outboard motor goes up but not down. I am thinking
My trip on my outboard motor goes up but not down. I am thinking it's either a relay or maybe the brushes in the motor. It's a 90 HP Yamaha 2009… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a 16' scot boat, replaced 90 2 stroke with 90 4 stroke
I have a 16' scot boat, replaced 90 2 stroke with 90 4 stroke .boat runs great ,I put wife in it and boat starts porpoising ,motor is Yamaha, were should motor be mounted on transom,excaty motor is si… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
2011 yamaha 90 hp 4 stroke (F90TXR) is losing oil. I recently
2011 yamaha 90 hp 4 stroke (F90TXR) is losing oil. I recently changed the oil and the boat was used for less than 10 hours and it is already low. There is no signs of oil leaking from the power head b… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I have a nice 17'6" Scout boat (Dorado 175) with a 90 hp
I have a nice 17'6" Scout boat (Dorado 175) with a 90 hp 4-stroke engine. Not used much during our last 5 months here in Florida, only done 84 hours since new in 2010 and soon ready for its 100 hr ser… read more
Charles
Charles
Certified Mercury Tech
5,752 satisfied customers
got a yamaha outboard 4 stroke 30 hp. Digital tachometer. it
got a yamaha outboard 4 stroke 30 hp. Digital tachometer. it runs fine. The trim tilt and the oil light and temperature light do not work. neither warning light comes on when key is turned. Although t… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I fogged my 2010 90 hp e-tec in the fall. Now it will not
I fogged my 2010 90 hp e-tec in the fall. Now it will not turn over. The starter engages but not enough juice to crank engine. I can tun engine over easily with a wrench on the top. I have tried 3 dif… read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Curious about how to decide how much weight the outboard motor
Curious about how to decide how much weight the outboard motor can safely weigh? I have a 1996 aluminum Lund Tyee model 1650. Lund says the max rated HP is 115. I. Want to replace the 90 HP mercury 2 … read more
Jason
Jason
Marine Mechanic
Vocational, Technical or Trade School
22,043 satisfied customers
Have a 90 hp 2007 Yamaha. The power trim switch for raising
Have a 90 hp 2007 Yamaha. The power trim switch for raising and lower on lower cowling is not working. We checked the fuses and replaced on by the battery term. Still does not work. Thoughts?… read more
Jeremy R.
Jeremy R.
MarineTechnician
9,023 satisfied customers
My Yamaha outboard hydraullic lift/trim device (small -- for
My Yamaha outboard hydraullic lift/trim device (small -- for a 15 HP Yamaha 4-stroke makes a 'straining' noise and now often hesitates before raising or lowering the engine. It can be encouraged to do… read more
Jason Forsberg
Jason Forsberg
Outboard Marine Mechanic
Vocational, Technical or Trade Scho
531 satisfied customers
I have 1984 Evinrude outboard motor on my 1984, 17 ft. Boston
I have 1984 Evinrude outboard motor on my 1984, 17 ft. Boston Whaler boat. The engine began to have problems at the end of summer. It would shut off at about 1/2 throttle. The boat mechanic performed … read more
Captain Dave
Captain Dave
Marine Mechanic
Master's Degree
2,672 satisfied customers
DIFFERNCE BETWEEN THE 90HP 4STROKE VS THE 115 HP YAMAHA ON
DIFFERNCE BETWEEN THE 90HP 4STROKE VS THE 115 HP YAMAHA ON AN 18FT BOAT WEIGHT APPRX 1200 LBS… read more
Jeff G.
Jeff G.
Marine Mechanic
Vocational, Technical or Trade Scho
4,730 satisfied customers
I recently purchased 4 HP four stroke Yamaha outboard for skiff,breaking
I recently purchased 4 HP four stroke Yamaha outboard for skiff,breaking in engine slowly as stated ,low RPMs, Has approx 10 -11 hours on engine.Before taking into dealer for 10 hr servicing engine st… read more
Tan
Tan
MerCruiser Certified Technician
Certified Marine Technician
11,409 satisfied customers
I am looking at purchasing a boat with twin 1990 250 hp high
I am looking at purchasing a boat with twin 1990 250 hp high performance Yamaha outboards with counter rotating props that have approx 1000 hours and have always been maintained by certified yamaha te… read more
Scott
Scott
Marine technician
Vocational, Technical or Trade Scho
543 satisfied customers
i have a yamaha 150 4 stroke boat motor and my trim gauge does
i have a yamaha 150 4 stroke boat motor and my trim gauge does not work but all trim switches work what is the problem/solution… read more
Jason Forsberg
Jason Forsberg
Outboard Marine Mechanic
Vocational, Technical or Trade Scho
531 satisfied customers
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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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