Mercury 90hp 4 stroke problems

Beginning summer of 2006 Ive started having quite a few problems with the engine. Changed the fuel filter changed plugs oil lower fluid replaced gas line from the fuel filter back to the tank including the ball.

1st time starting it up.

Mercury 90hp 4 stroke problems. Well here is an interesting issue. My motor started acting up last fall. It inadvertently cuts out at any speed any time.

Some times worse some time better. I have treated the gas with sea-foam I mostly run super. Changed the fuel filter changed plugs oil lower fluid replaced gas line from the fuel filter back to the tank including the ball.

Posted 07-17-2005 0439 PM ET US Last year I appended a couple of posts re my brand new Mercury 90-HP four-stroke that was hard to start idled roughly spittingcoughingsevere engine shake and then died. Well heres an update. The motor is a 2014 Mercury 90 HP 4 stroke with 42 Hours.

The issue started out around 20 Hours and has progressively became worst. The motor will hesitate for a brief second at full throttle and give a quick 1 beep alarm like the startup beep. By wrd1972 Sun Sep 04 2011 147 am.

The Mercury 90hp 4 cycle EFI motor starts great cold and runs strong without issue. However once its turned off for an extended period of time say 30 minutes it starts fine but runs like crap. It lacks power and.

I have an ongoing problem with my 2012 Mercury 90 HP 4stroke EFI engine. It will run fine for a while and then all of a sudden it makes a high pitch sound and loses all power. I have to put the boat in neutral and then after a few minutes I can coax it to run again but cannot ever get it above 300 rpms.

2006 Mercury 4 stroke 90 EFI fuel problems. The fuel pressure regulator is inside the FSM and you will have to remove the intake assembly to service the FSM. Another possibility which would cause your problem would be a faulty IAC.

2006 mercury 90hp 4 stroke efi fuel issues please help. Drain as much of the remaining fuel as possible from the tank. Change the fuel filter.

Put about 10 gallons of fresh gas in the tank. Add a full can of SeaFoam. Start and let idle for at least 10-15 minutes.

Launch and run the rpms up and down under load. I have a 2010 90 HP EFI 4-stroke mercury. I bought the boat from my father in-law who said it did not have any issues.

So when i bought it there was an issue with fuel starvation due to the fuel pump cavity not being drained for winter storage last year. I replaced the internal float and no more starvation. Problem with 90hp mercury 4 stroke.

I have a 2014 90hp four stroke Mercury with 200hours on itRecently I slowed down to go under a bridge and on acceleration it just died as if it ran out of fuel. On examination it had zero compression. And switch failure does not set a code.

If you have a Mercury EFI 4 stroke I recommend you get to know the symptoms of FSM problems and dont let the shop BS you around installing filters and replacing fuel line bulbs. This isnt caused by ethanol but by cheap OEM sourcing by Merc. Next time itll be a Honda for me.

06-21-2015 0611 PM. 2014 Mercury 90hp fourstroke issues. So Ive had my new crestliner boat for a year now at 5 hours my motor dropped a valve and blew up Mercury warrantied the motor and put a replacement unit on now with 20 hours on the new motor the thing is getting water in the oil about 2 quarts of water evrey time I change it cause Im.

2000 mercury 90hp 4 stroke. Model 1F90412WD serial 0T065331. 1-engine died on my wife and her sister while running at 3000 rpm and would not start.

2-they were towed in. 3-battery was super dead. 4-i charged battery to full charge.

5-lights and accs work but tach fuel gauge and any motor component would not energize or work. Here is another long discussion about problems with the carburetors in the Mercury 90-HP four-stroke motor. They appear to require frequent cleaning.

My local Mercury dealer is cleaning out old stock on Service Manuals. I have a Mercury 90HP 4 Stroke on a 1800 pro v tiller. It has a 16P Vengence prop.

At WOT my RPM gauge is pushing 6000 RPMS. Not sure what this motor should be at for RPMs with that set up and what max RPMs for that motor should be. Im a dedicated do-it-yourselfer but am at a loss.

I have a 1996 90 HP mercury elpto thats giving problems. This boat has some issues when power is added. It hesitates and then stays at low rpms.

To date Ive confirmed fresh fuel with no H20 in it put new gaskets in the fuel pump changed an ignition coil and changes the spark plug wires. Mercury 90 Hp 4 Stroke Efi Outboard Motor Global Sources. 2021 Mercury Fourstroke 90 Hp Command Thrust 25 In Shaft For Rochester Ny Bryce Marine 585 352 9485.

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My motor has developed an intermittent fault that produces fuel starving symptoms. While running at 4000-4500 RPM the motor dies which can usually be halted by giving it more throttle. Not sure about the significance of this but the priming bulb goes soft and the starving issues can often be resolved by squeezing the bulb a few times.

1st time starting it up. 2017 Mercury 90hp 4 stroke Not rated yet Went to take my boat out of the water after the season and had a very hard time getting it to go in to gear reverse was fine but forward was an issue. Mercury 150 four stroke 2016 Not rated yet Turn key engine whistles starts runs for 4 seconds and dies.

I have a 2005 Mercury 90HP four Stroke EFI that I purchased on a 17 boston Whaler summer of 2005. Only have about 25 hrs on it. Had the 10 hr maintenance done on it by a certified mech.

And winterized end of 2005. Beginning summer of 2006 Ive started having quite a few problems with the engine. Here is what is happening when I try to start it with a full tank and primer bulb hard it will.

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WHAT MERCURY WILL DO. Mercurys sole and exclusive obligation under this warranty is limited to at our option repairing a defective part replacing such part or parts with new or Mercury Marine certified remanufactured parts or refunding the purchase price of the Mercury product. Mercury reserves the right to improve or modify products.

150 HP 2013 Mercury Fourstroke with 15x15P SS Enertia Thanks Todd - 41 MPH at 5800 RPM light load. 39 MPH at 5700 RPM heavy load. 115 HP 2012 Mercury 4 Stroke with Black Max 13-34 x 15P.

• 35 MPH at 6400 RPM with light load but 15 mph in turns when tubing with a loaded boat.