Engine troubles - 2006 Yamaha VX 110 Deluxe (ethanol, gas, octane, mph)

[rossmoyne]

Last weekend I took my jet ski out and it did not run right, The fastest I could get it to was about 30 MPH, usually I can cruise around 45 if I want to. It seems like it's got one spark plug that isn't firing. It did run right for a couple of minutes, then just slipped back into the problem.

The gas should be good, I bought it where I always do - I use 93% Octane regular gas - no ethanol.

Any ideas where I should start?

Thanks.

[burdell]

Originally Posted by rossmoyne

Last weekend I took my jet ski out and it did not run right, The fastest I could get it to was about 30 MPH, usually I can cruise around 45 if I want to. It seems like it's got one spark plug that isn't firing. It did run right for a couple of minutes, then just slipped back into the problem.

The gas should be good, I bought it where I always do - I use 93% Octane regular gas - no ethanol.

Any ideas where I should start?

Thanks.

"The gas should be good" isn't the same as the gas IS good, did the problem start after filling up? If it did it's certainly the place to start looking. The plugs look fouled? Were they changed?

[rossmoyne]

New set of spark plugs and away we went. No issues at all this past weekend - except I didn't get enough time on them.