'89 Johnson GT200 Idle Setting?

[DaveJ50]

One of my buddies just purchased a boat with an '89 Johnson GT200 which idles at 1500 rpm which he thinks is a little fast.<br /><br />The guy is pretty good around stuff like this but says he has been unable to find any way to set the idle.<br /><br />I thought I would run it by you all to see if I could find him some help.<br /><br />Thanks<br />DaveJ

 

[walleyehed]

Re: '89 Johnson GT200 Idle Setting?

It's set by slowing the timing...<br />It's also a problem if the throttle plates have not been sync'd...and I "assume" you are doing this "IN" the lake and not on muffs.

 

[DaveJ50]

Re: '89 Johnson GT200 Idle Setting?

Well, he grinned and said that this is on muffs and not the lake. He said that after hearing your response he remembered his Tracker w/9.9 runs a little faster on muffs.<br /><br />Would you happen to know how / what to set the timing. <br /><br />As for me, I am surprised that muffs would make any difference. Is that an exhaust pressure thing?<br /><br />Thanks<br />DaveJ

 

[Dhadley]

Re: '89 Johnson GT200 Idle Setting?

Yes, backpressure. Set it in the lake and when it's out of Quick Start. Theres a big plastic knob on the starboard side. Thats the idle timing adjustment. If it won't come down when you back off the adjustment, some models have a screw on the port side under the flywheel. Turn the screw in to set the idle down.

 

[Dhadley]

Re: '89 Johnson GT200 Idle Setting?

Double dip. Or that darn echo again.......