Whaler Central - Boston Whaler Boat Information and Photos

Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: 1998 Dauntless 18’

Posted by WhalenBradley on 07/05/23 - 5:06 PM

My 2005 135hp optimax will not idle. It run great, but if the rpm drops below 850 the motor will die. I have installed new plug and filters even have run mercury injector cleaner and still the same thing happens. Any thoughts?

Posted by Phil T on 07/06/23 - 11:07 AM

The carbs need to be adjusted. Idle set screw too.

Posted by WhalenBradley on 07/06/23 - 5:39 PM

It is fuel injected.

Posted by Phil T on 07/06/23 - 6:02 PM

Sorry, read it too fast.

Confirm you have already done the following:

Cleaned VST
Cleaned MAP sensor
Fuel and air pressure test
Run the engine off a separate tank (to eliminate hoses and venting)

Check fuel lift pump.
Check tracker diaphragm
Inspect the injectors

Edited by Phil T on 07/06/23 - 6:06 PM

Posted by WhalenBradley on 07/06/23 - 7:23 PM

Thank you there is several on your list I have not tried!!