1995 johnson 70 hp / running trouble

[wisemack34]

Runs great when it's cold,,,won't run over 3400 rpm's when hot....i can put the boat in the water sat morning run across the lake...and stop and troll for about 2.5 hr's and start the boat up and 3400 rpm is it...but i can troll for about 5 hr's and it will run great.....it's like when it get's hot it won't run full speed.....could it be...
1. coil pack
2. coil
3. stater (how it spelled right)
4 ?
i hope some of you guru can help me............
I have to say you guys on here are great to help someone.....

 

[JB]

Re: 1995 johnson 70 hp / running trouble

Sounds like a hot failure, Mack. Dropping one cylinder. It should still idle and troll on 2 cylinders as though there is no problem. If the S.L.O.W. circuit were coming on it should limit the rpm to around 2300-2500rpm.

They are most likely to be in the powerpak, though the coil and stator are not out of suspicion.

However, don't start throwing parts at it yet.

Get a hair dryer (not a heat gun. Heat guns get too hot and can cause new problems). Start her up on the muffs and apply heat to the powerpak, then the stator, then the coils. Keep the heat on one part for several minutes. The chances that you will be able to get a hot failing part to fail are pretty good. If you get the hot failure the idle speed will drop. Take the heat away and it should soon pick back up again. Now you know what part to change.

Good luck.

 

[wisemack34]

Re: 1995 johnson 70 hp / running trouble

now im talking about trolling the the ......trolling motor the the 70 hp motor.....if that helps

 

[wisemack34]

Re: 1995 johnson 70 hp / running trouble

man i wrote that all wrong..lol.. sorry..i troll with the trolling motor not the 70 hp motor....thats a little better...

 

[rickdb1boat]

Re: 1995 johnson 70 hp / running trouble

Here's my answer from your other post:

http://forums.iboats.com/bbBoard.cgi?a=viewthread;fid=28;gtid=1258986 ] Click Here [/url]