points on 9.5 johnson

[electricakash]

I have a 68 9.5 that i jst got from my brother in law, i realized it was running on one cylnder and decided to change Coils, plugs, and set points! It was running fine before i did all this ( on the one cylnder ) now it wont even turn over!! I was just reading another thread talking about setting the points at "TOP", now thinking i may have set mine wrong or something!! Any suggestions or solutions??

 

[Daviet]

Re: points on 9.5 johnson

Look on the cam that operates the points and see if it has a spot marked "top" on it. That is where the rubbing block needs to be when you set the point gap. Should have a bright blue spark and jump 1/4".

 

[Rick.]

Re: points on 9.5 johnson

If your top isn't marked, just rotate the cam until the point block is at the highest part on the cam. I remove my plugs and turn the prop to turn the cam, always turn the cam in a clockwise direction. Did you replace them? Make certain the wires are not making contact with anything that turns. Best of luck. Rick.

 

[F_R]

Re: points on 9.5 johnson

By won't turn over, are you saying you can't rotate the flywheel? If so, you must not have adjusted the coils. The ends of the laminated cores must be flush with the machined edged on the posts upon which they sit.

 

[Rick.]

Re: points on 9.5 johnson

Good point. I didn't read it that way. Rick.

 

[electricakash]

Re: points on 9.5 johnson

The flywheel will turn, I mean it won't start!! I have even tried putting fuel strait to the carb! The coils are mounted right (flywheel turns), but do not see ANYTHING that says top on it at all. No wires rub anywhere, and guess i don't understand what you mean by "rotating cam until point block is at highest point on the cam". What i did was rotate cam until point gap opened up and set to .020 then rotated again until other point opened and adjusted, put flyweel back on and tried to start it! Do you literally mean "highest" by the points moving up on the cam? sorry for lack of knowledge i am waitin on ken cook co. to find a manual for me.

 

[Daviet]

Re: points on 9.5 johnson

The cam is egg shaped, rotate the crank until the points are at the top of the cam, where the points are open the widest, and set them to .020. then rotate the crank until the other set of points are open the widest and set them to .020.
The point block is the part of the points that rub on the cam.

 

[Rick.]

Re: points on 9.5 johnson

Sorry if I confused you. Daviet gave better description that I for sure. Once set to .020 no matter where you turn the cam the most your points should be open is.020 . There, I probably just did it again. Rick.

 

[tashasdaddy]

Re: points on 9.5 johnson

read this: http://forums.iboats.com/showthread.php?t=299680

 

[crxess]

Re: points on 9.5 johnson

Some crankshafts have the word TOP stamped just below the threaded end. This indicates the high point on the points cam(egg)
Most cams that are not marked use the Key slot as Top(high center)

To confirm high point for proper setting. Just make sure the points will open. Turn motor clockwise to open points. Rock prop slightly back and forth(in gear). Once the highest point is confirmed set gap.

Set the flywheel loosely in place and turn motor by hand several times.
Remove flywheel and recheck gaps.

If all is good install and torque flywheel.

 

[Tim Frank]

Re: points on 9.5 johnson

I may have missed something, but there has been no mention of spark....or its absence.
Check for spark on both cylinders. If there is none, recheck the wiring connections at points and coil.
If you have spark, make sure that plug wires are not switched.

 

[14ftgrumman]

Re: points on 9.5 johnson

Just make sure when you are ready to button it up that the flywheel nut is torqued, with a touque wrench, to mfg's spefication.

If you fail to do this, you will be removing the flywheel and replacing the flywheel key.

Don't ask how I know.

 

[tjandrews]

Re: points on 9.5 johnson

The flywheel will turn, I mean it won't start!! I have even tried putting fuel strait to the carb! The coils are mounted right (flywheel turns), but do not see ANYTHING that says top on it at all. No wires rub anywhere, and guess i don't understand what you mean by "rotating cam until point block is at highest point on the cam". What i did was rotate cam until point gap opened up and set to .020 then rotated again until other point opened and adjusted, put flyweel back on and tried to start it! Do you literally mean "highest" by the points moving up on the cam? sorry for lack of knowledge i am waitin on ken cook co. to find a manual for me.

If you don't see any marking on the cam, try sliding it off the crankshaft and turning it over. If you now see the word "top" or possibly another mark, the cam was installed upside down. That will affect the timing of the spark.

Have you determined that you are actually getting spark on both cylinders? If you don't have a tester, you CAN test for spark by removing the plugs, connecting them to the plug wires, then while touching the bottom electrode of each in turn to a stationary metal part, pull the starter cord as you observe the gap. You may have to be inside to see it, but you should see a blue spark jump the gap on each plug.

Oh! And when you put everything back together, make sure the top wire is on the top plug, and the bottom wire is on the bottom plug. You'd be surprised how often the simplest mistakes show themselves, even among the experienced.