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90hp yamaha outboard. Oil alarm goes off but doesn't need any. Goes off while idleing and moving slowing. What could be the problem. Wont go off unless I move throttle back and forth for a bit. THen it stops and the engine runs smoothly again.

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Posted on Jan 02, 2017

  • 41 Answers

SOURCE: Rough idle 2 cycle outboard

sounds like u need to do a tune up on it. clean the carb, new plug

Posted on Nov 25, 2008

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SOURCE: 2003 Jeep Liberty Electric Mirrors only move a tiny bit then stop

it sounds like the switch is going bad in the mirrro switch on the driver door should be able to get on at any dealer it should be any fix

Posted on Jan 25, 2009

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SOURCE: 40hp 1987 yamaha outboard motor will run for 30-60

Sound like the fuel pump is not keeping up with the engine's demand. Check it out. Good luck. Hope this helps.

Posted on Apr 27, 2009

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SOURCE: outboard motor idles but will not speed up

You really have to blow out the jets to clear any varnish left over from lay up.

Posted on May 13, 2009

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SOURCE: T50 4stroke yamaha outboard

that engine should be electronic ignition, so I would suspect your problem is your coils.

Posted on Jul 12, 2009

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Hi, Lee and the usual suspects are:
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1994 Yamaha 150HP Outboard

Good Afternoon BayouNola,
This Sounds Like A Loose Connection Problem,
The Tach Is Directly Related To The Charging System,Please Check Your Battery Terminals ,Clean And Secure Tightly To The Battery,
Unplug The engine Electrical Harness Check Clean And Re plug,
Check The Main Fuse For Corrosion And Rectify If Necessary,
If The Engine Was Getting Hot The Alarm Should Be A Continuous Alarm, If It Is a Intermittent Alarm It Is Oil Related !
If In Any Doubt Run With Pre Mixed Fuel,( 500 Ml's In 25 Ltr's Fuel) Until The Problem Is Solved.
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Outboards have thermostats...the tattle tale can be pouring water and the engine still overheat if the thermostat is stuck or airlocked.

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sounds like a bad coil or trigger. Find the offending cylinder with a timing light and physically move the coil to a good firing cylinder. If the problem follows the coil, you have it, if not you need a trigger,

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Although water is seen thru the tell tail hole, your engine is overheating. When were the thermostats replaced last? Water pump impeller may also be fatigued, and not pumping enough at high RPM's.

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