still have this problem. 1998 johnson 150 oceanrunner. check engine alarm sounded a few times last year. in the spring, it was gone. about 2 months ago, it started again.<br /><br />there is no trend that i can tell. sometimes it goes off at 3000 rpms with a cold engine. other times it goes off after running at 4000 rpms for 30 minutes. yesterday, it went off after running at 3500 for about 10 minutes. it cleared and i stopped for about an hour (fishing). then i ran home for 20 mintues at 4500 rpms with no alarm. when it does sound, it seems to clear itself within 10-20 seconds, regardless of whether i slow or keep going.<br /><br />i've cleaned the filter and changed the primer bulb. hoses all seem to be intact. could it be the sensor? how hard is it to get that part(s) and change? i have the manual, just haven't looked yet. thanks-
