Help! '99 225 Ocean Pro (not a Ficht) idle issues

My motor is giving me fits and i need some new ideas.

When it's in the water it keeps cutting out at idle. When the boat is out of the water and hooked up to the hose it idles fine. I put in new plugs gapped at .30 but it idles better with a larger gap even on the hose. Any thoughts????

Re: Help! '99 225 Ocean Pro (not a Ficht) idle issues

welcome to i boats. i hear this over and over. you can not set the idle on muffs, you can get close. on muffs the idle has to be high. 800-850. the reason and there is not any backpressure on the exhaust system. you have to set the idle speed screw in the water, and in gear. set your idle high on muffs, then put in the water, and fine tune it there. that's your problem. any engine idle better with a little more gap, but not at high speed.
on the small engine, it is known that if you use the motor more for trolling, you open the gap .005-.010 increase. it reduces fouling. but if you do a lot of high speed running you set at the MFGR's recommended setting.

Re: Help! '99 225 Ocean Pro (not a Ficht) idle issues

tashasdaddy said:

welcome to i boats. .

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Thanks for the welcome! I don't really have the problem at trolling speed but it is problematic when trying to maneuver around my small boat club marina and pulling into the ramp.

Re: Help! '99 225 Ocean Pro (not a Ficht) idle issues

like i said you idle is set to low. should idle IN THE WATER, AND IN GEAR. 650-750 RPMS.