Problems with '69 Johnson 25hp

The motor was running good, until the boat came off the trailer.
3 years later, I'm trying to get it running again.

Replaced the steering bracket which broke when it came off the trailer, and
put it back together, but now it will not idle, it runs, but you have to work the throttle arm with the cover off to maintain an idle.

Looking at the advance plate, the 2 witness marks that I assume to designate "idle" and "shift" positions are about an inch away from the throttle roller, to the left. If you turn the throttle all the way to the shift stop, you are still not on the first mark.

From looking at the parts, there looks to be no way the brass stop attached to the advance plate could have changed position to put the idle mark so far off.

When the motor is shifted to forward or reverse, the throttle roller will end up on the end of the throttle cam where it should be.

The throttle stop linkage appears to be touching lower on the shift stop arm from where it has been ground flat from the factory.

I am at a total loss to figure this out, because you can't screw in the idle adjust screw far enough to make it idle because the tension spring is fully compressed.

HELP!!!

Wayne

Re: Problems with '69 Johnson 25hp

Compression and spark good? Check fuel to carb, if ok remove carb and clean.

Re: Problems with '69 Johnson 25hp

Motor runs ok, but will not idle looks like linkage is messed up

Re: Problems with '69 Johnson 25hp

The cam, which the roller rides on, and which is attached to the armature plate, should have marks on it. When the roller hits the first mark on the cam, the throttle should just start to open. The two vertical marks on the armature plate are to time the opening and closing of the points.

Re: Problems with '69 Johnson 25hp

are you referring top the 2 marks on the magneto plate that the roller contacte?

The marks are for the link and sync of the ignition to the carb.

If you don't have a manual, don't fool with them because you will be in deep doodoo and will never get the thing to run right.

check compression and spark. The old sytle coils get cracked over time and need to be replaced. Pull flywheel off and check the physical condition- you are looking for cracks and burn traces.

When you put the flywheel on, use a TORQUE WRENCH and TORQUE the flywheel nut to 45 ft/lb.

Re: Problems with '69 Johnson 25hp

coils were replaced in '89 they look good.
throttle doesn't start to open until first mark.
doesn't really open until 2nd mark, then starts to open.

Set the points, has good hot spark on both.

Will try in the water again & let you know.

Thanks to all!

Wayne

Re: Problems with '69 Johnson 25hp

read the TOP SECRET FILE.

Re: Problems with '69 Johnson 25hp

Wayne, sounds like you may have got some of the linkage off when you replaced the steering bracket and arm. Post some pictures of the throttle linkage and let us see if we see something.

Flintcreek