1972 johnson 9.5 timing question

[Jimmygreer]

I just installed both sets of rings on this motor because it had low compression and wouldn't get up and go nor would it idle well. I finished putting it all back together but I can't get it to fire. The plugs both spark and the compression is good. My question is do I need to set the timing even tho I didn't mess with the points. I mean i did remove the fly wheel and the armature plate but it can only go one way right? I sprayed starting fluid into both cylinders and still no fire. Any help at all would be appreciated.

 

[Daviet]

Re: 1972 johnson 9.5 timing question

Did you actually check for spark? The timing is pretty much controlled by the points opening at the proper time. You might want to remove the flywheel again and make sure the points are opening properly. Check and make sure you did not pinch any wires under the flywheel.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

Yah I did check for spark numerous times both cylinders have spark. I also removed the flywheel again and I don't see anything pinched. Guess I'm gonna strip it back down one more time and start all over its ashame tho because its got really strong compression and a good spark seems like it ought to fire of starting fluid atleast.

 

[Mandrake35]

Re: 1972 johnson 9.5 timing question

Is it possible you have the wires reversed?? Just asking you never know.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

I believe I have the plug wires right because I put a zip tie on the top one before i took it off. But I am getting frusterated and starting to doubt that i even remember now haha. But even still they kind of just naturally fall into place because they are the old ones and just tamed that way I suppose. Something else I just noticed is that it seems the magneto's have been rubbing on the underside of the flywheel since I have put it pack together. Do you think this is because the crankshaft is not exactly where it was before. Because I went to hit the flywheel one with a small hammer and I am wondering if i knocked the shaft back a smidge. I am tired of messin with it for today but I'm going to tear back into in the mornin. Thanks for your reply's. Let me know if you think of anything else.

 

[crxess]

Re: 1972 johnson 9.5 timing question

DO NOT USE STARTING FLUID IN A 2 STROKE MOTOR!!!!

It has 0.000 lubricating ability. Put some pre-mix in a spray bottle.

Remove cowl, remove both spark plugs. connect 1 spark plug to its coil wire and ground. Turn flywheel to get a spark. Check to see that the piston for that plug is at or near TDC.

If you pull the flywheel, make sure the coils are not rubbing. adjust if needed. Double check the Points adjustment.

Nothing goes back together exactly the way it was.

Give each cylinder a squirt of fuel before installing the spark plugs.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

Thank you I will try the pre mix in a bottle in the morning. When you say adjust if needed, how do I adjust the flywheel or do you mean adjust the shaft by tapping it out a bit? and I will check for tdc in the morning as well, I was actually about to check when I realizede the coil were rubbing so I just folded up shop for the day...

 

[crxess]

Re: 1972 johnson 9.5 timing question

Actually I mean adjust the coils to get them off the flywheel. They will move a little.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

Oh I see. Well the problem i'm having with the coils is the top of them is rubbing and i see no way to drop them down. But I do think I can adjust the crank. I mean its just like a millimeter or 2 that I need to clear them.

 

[crxess]

Re: 1972 johnson 9.5 timing question

Did yo dead blow strike the end of the crank shaft? This could have driven the bearings out of place.
You may have damaged the point where the lower bearing rest.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

no I didn't hit the shaft I used a block of wood on top of the fly wheel and hit both sides a few times.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

Okay I got it all torn back down and cleaned everything up and made new gaskets. I pressure washed all the carbon off of the exhaust side. The flywheel does not seem to be rubbing anymore. The only problem now is I lost 3 off the little needle bearings somehow. The didn't go down in the block thats why i had it all apart to make sure they weren't in there. Does anyone know where I could get some of these. Gonna try napa today they were already closed last night by the time i realized they were missing.

 

[Rick.]

Re: 1972 johnson 9.5 timing question

If your flywheel is rubbing the top of your coils something isn't put back together properly. That should not happen. Definitely recheck your point gaps when you get it back together. Rick.

 

[Jimmygreer]

Re: 1972 johnson 9.5 timing question

Okay got it all back together. What it was was the brass plate under the coil plate had bent making it sit up higher allowing the flywheel to rub. I straightened it out and everything seems to be fine. Runs like a top except for a cough at idle. But I have yet to set the points so that is next but I am just happy that she has power now.

 

[tjandrews]

Re: 1972 johnson 9.5 timing question

Okay got it all back together. What it was was the brass plate under the coil plate had bent making it sit up higher allowing the flywheel to rub. I straightened it out and everything seems to be fine. Runs like a top except for a cough at idle. But I have yet to set the points so that is next but I am just happy that she has power now.

So what did you do about the missing needles from the bearings?

 

[tjandrews]

Re: 1972 johnson 9.5 timing question

Okay got it all back together. What it was was the brass plate under the coil plate had bent making it sit up higher allowing the flywheel to rub. I straightened it out and everything seems to be fine. Runs like a top except for a cough at idle. But I have yet to set the points so that is next but I am just happy that she has power now.

After you check the point gaps, be sure to check the carb/magneto synchronization. Look for an odd-shaped plate under the magneto with a line on it(magneto cam), and look for the throttle lever on the carb that's near or resting against it. There's an additional plastic part between them on my 9.5, but it's older than yours and may be different. Watch these as you work the throttle back and forth. The throttle cam should start to move the throttle lever at the line, not before and not after. Adjust it by loosening the set screw on the throttle lever, and moving the lever on the shaft.