Hot No Start: Link and Sync or Choke Problem: 1976 115hp

Coachjfk

Seaman Apprentice
Joined
Aug 2, 2005
Messages
34
Johnson 1976 115 hp Glastron T-17B

Boat is running well. Pulling wakeboarders right up out of water at 7,000 ft elevation.

When I shut down motor after running and try to restart, It just won't restart without some persuasion. I have to go through the same procedure #1 shown below as I do when starting up cold from the dock. This is kind of a bummer when stopping to let wakeboarders back into boat.

I can see two problems but time on water is scarce, so I am reluctant to make changes and screw things up.

1) Automatic choke does not work. Not a big deal. Remove cover, pump bulb hard, manually close choke, start...cough...die... open choke manually and starts right away.

2) Marks on cam follower for Link and Sync are not lined up right. Roller might be 1/4 inch short of (Start) mark while in the Start position.

I have the manuals, so I know and can follow the procedure, no problem. I would think that the motor would start "hot" without needing to choke it. What is interesting is that it tries to start, coughs and dies while choke is manually on. Yet, it actually starts only when butterflies are open.

Which leads me to believe that it has something more to do with the "Link" between the carbs and the timing since I can see that they do not line up with the marks on the follower.

Obviously, I should fix both, but I don't want to risk missing a day on the water since the wife and kids will be very disappointed. Boat runs like a champ once it is running.
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Re: Hot No Start: Link and Sync or Choke Problem: 1976 115hp

You may find the engine starts better after the sync and link procedure is completed. I'd probably fix the choke too. That unit has a mechanical solenoid which activates the choke plates. Fairly inexpensive. Why not replace it so you don't have to pull the cowling every time? Have you checked for fuel leaks around the hose clamps inside the cowling?
 

motoman

Seaman
Joined
Jul 5, 2011
Messages
56
Re: Hot No Start: Link and Sync or Choke Problem: 1976 115hp

I have a 1975 Evinrude 70 hp and I am have the same issue . My choke works fine and I have no issues with a cold start ,it starts really great . The engine runs fine just like it was new ,till you shut it off and fish for a while then when you go to restart it does not want to start some times you think that it's not . I will check the primer bulb and it is OK. Think that a link and sync will help or a carb rebuild ? Not sure when it was last done and the cam roller doesn't line up as the manual say's .
 

Coachjfk

Seaman Apprentice
Joined
Aug 2, 2005
Messages
34
Re: Hot No Start: Link and Sync or Choke Problem: 1976 115hp

Yes, I expect to get out on the water only one more time this year.

I'll probably defer this to the off season and correct both issues.

Rebuilt the carbs last season. Clamps are tight and no fuel/air leaks under cowling. This made a huge improvement on how things run.

I guess that I'm just chicken to make the changes this season and disappoint the family if I run into something that keeps us off the water.

Thanks to all for the help.
 
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