89 Evinrude 15 hp idling issue

[Apexmaster34]

hello, I have a 89 15 hp, with very low run time only about 20 hours. but it has sat for over 20 years, last week i finished doing a complete tare down, on carb, reed valve, spark plugs, new head gasket, etc. it has electric start. engine starts as it should but will not idle by it self. i have set the low idle mixture screw to 1.5 turn out from all the way in.
I am having a hard time lining up the mark on the advance plate with the round thingy on the top of the throttle arm. one video says they need to line up with about 10% throttle., however mine are so far apart no matter what I do with the idle screw adjuster.

 

[Apexmaster34]

how do i perform this?
"Link and Sync" of the carburetor throttle arm roller to the timing plate cam.

 

[w2much]

If you can post a picture that would be helpful. Also Leeroys Rambling, google it. Interesting site for you. Tiller or remote ? Model # ?

 

[oldboat1]

http://ww2.iboats.com/Carburetor/dm/cart_id.431300909--session_id.903927448--view_id.1546907

You seem to have done more than usual to wake up a motor. The thick washer (#9) has to be in place for purposes of the linc and sync. Additionally, the cam plate has to be in place (#43: http://ww2.iboats.com/Ignition/dm/cart_id.431300909--session_id.903927448--view_id.1546910 I don't know how far into it you went, but the cam may not be mounted right.

Don't do any test running until you replace the impeller. If it's old and deteriorating, bits and pieces can end up in the cooling passages -- in addition to overheating the motor.

 

[Apexmaster34]

pic 1 10% gas
pic 2 no gas
pic 3 full gas
https://photos.app.goo.gl/QyRUL8qFK94YG14aA
https://photos.app.goo.gl/zfa6n8DB8Q1JX4oA9
https://photos.app.goo.gl/U9EC6kGfZWpnuhUR8

 

[oldboat1]

Not sure if I can help. With no throttle, the roller should not contact the cam. With some throttle (slight), it should first contact the mark on the cam. At full throttle, the roller should be at the high part of the cam. The throttle will not fully open unless the motor is in gear.

It looks like the timing plate is not turning, but not sure -- could be a linkage issue with the throttle control. You might try turning the timing plate by hand to see how the roller and cam follower operates. And I guess the problem might be that the cam is in the wrong place, as mentioned earlier.

 

[flyingscott]

You need a new roller the outer part has fallen off. Very common with those there used to be a clear outer part. You cannot link and sync it with the roller the way it is. It will also cause all the problems with your idle.So buy a new roller for a little over $20 do the link a nd sync and be happy. To do the link and sync turn the throttle until the mark on the cam lines up with the middle of the roller. Turn the screw in the plastic arm until the roller touches the cam. Then give it another 1/8 of a turn and you are done. If the cam was in the wrong place there is no way the stator plate would screw together correctly. The cam is sandwiched between the two plates on a knob.

 

[OptsyEagle]

Does the cam move in the same direction as you turn the twist grip fully? You have pictures where 0 gas is touching the cam and 10% gas is not. Are those pictures reversed. In any event, I can't imagine the procedure specifies setting anything at 10% gas, since it would be impossible to know it was exactly 10%. If you got that from a youtube video just forget about it. That was just another video designed to get you to watch it but made by someone who may have no idea what they are doing. There are a lot more of those on youtube, so be aware.

Also, that motor would have a neutral stop on it. A neutral stop is designed to prevent you from over revving it when in neutral. It actually stops the movement of the cam when the motor is in neutral. I imagine if you put it in gear you could move the cam fully over to the other side. Give that a try or let me know if that is what you did when you said you were at "full gas".