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2006 90 HP will not idle

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Paul Conklin

New member

My son has a 2006 90 hp Optimax. It ran fine last fall, winter and spring. It would troll for hours without a problem. All of a sudden it will start and die in about 30 seconds. If you rev it up right after starting it will run fine revved up but will die when slowed down. He purchased a manual and checked the fuel pressures. Low pressure 33#, High pressure key on engine not running 30#, High pressure engine running 108#, Air pressure 95#. The pressure was tested with a flushing attachment and a clean new fuel source. Thank you for any help you can give. Engine SN 1B362014
 
Check all the batteries. (alternator is boosting it above idle)
If the motor was not winterized than run Quickclean to flush the injectors. It that makes it better than you found your problem. Hope you do not wind up replacing them at $350 ea.
You might want to check all the spark plugs for fouling out, too.
But those pressures are fine.
 
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