1974 johnson 70hp idling in gear prob.

[stevenmrob]

model number is 70esl74m. i replaced all three coil packs and remaned the carbs. compression is 135, 130, and 140. motor cranks and idles fine in neutral and once you get going you have full throttle. the motor just wont stay running in gear at idle. it will run for a few seconds (10-15 tops) and then starts to bog down and stops but will stay runing if returned to neutral. motor is in a drum when put into gear. wot is only at the lake. i am wondering if the problem is in the timing somewhere.

 

[DJ]

Re: 1974 johnson 70hp idling in gear prob.

Get the appropriate manual and check your "Synch/Link."

 

[stevenmrob]

Re: 1974 johnson 70hp idling in gear prob.

i got a manual but not sure what it means. I am a boat motor newbie

 

[stevenmrob]

Re: 1974 johnson 70hp idling in gear prob.

are you talking about the timing and synchronization procedure

 

[stevenmrob]

Re: 1974 johnson 70hp idling in gear prob.

can someone explain what he meant by this "Synch/Link"

 

[stevenmrob]

Re: 1974 johnson 70hp idling in gear prob.

could it just be that it is idling to low.

 

[bassfearmee]

Re: 1974 johnson 70hp idling in gear prob.

He's talking about Syncronization and Linkage adjustment. There's a procedure you need to follow that's only in your factory manual. You're not going to find it in an aftermarket manual. My motor is a 1989 50HP Evinrude, below is the procedures for my motor. The will be different for yours:


http://forums.iboats.com/attachment.php?attachmentid=47621&d=1269612998