20HP Johnson 1990, Fast Idle Problem

CrowdedHouse

Cadet
Joined
Jul 11, 2007
Messages
11
This hopefully will be an easy fix. Had this boat a few
years with no problems....New plugs every year and that's about it...winterized for the winter and fresh mix in the spring...I talked to a marine mechanic about a year ago and told him I wanted to purchase a "tune up" kit...he looked in the computer and said this motor didn't have one...????

Anyhow, I'm selling the boat....I took it out a few weeks ago and it ran great for about two hours..Today when I started it up, it's idling very fast. When I increase the gas it stalls out? Any advice would be greatly appreciated!
 
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