22 hp Briggs and Stratton V -Twin won't start

[Todd Caulder]

I just rebuilt my V-Twin because one of the rocker arms broke. I replaced both rocker arms pistons and rings. Ne head gaskets ect. I still can not get it to start. It has spark, and is getting fuel. any ideas??

 

[JeffG]

Check clearances on valves?

 

[Todd Caulder]

I have checked and set valves clearances. .005/.006 I removed valves and cleaned them to good seat. Leak test showed 12% on #1 and 22% #2. I did notice the flywheel looks like it has moved but only more like it has squeezed the key not broken. Would that make it not start? I did make sure the timing dots matched before putting it back together. I have rebuilt 3 or for single cylinder, but this things has me scratching my head. (or pulling my hair out).

 

[Frogfarmer]

At this point verify your timing events. Pull the valve covers And flywheel cover. Verify that your valves are opening and closing at reasonable points based on Top Dead Center. You can pull the plug verify TDC. Also when it comes up on the compression stroke verify that your magnetos are lining up with the magnets on the flywheel. I suspect a sheared key given the recent teardown.

 

[JeffG]

At this point verify your timing events. Pull the valve covers And flywheel cover. Verify that your valves are opening and closing at reasonable points based on Top Dead Center. You can pull the plug verify TDC. Also when it comes up on the compression stroke verify that your magnetos are lining up with the magnets on the flywheel. I suspect a sheared key given the recent teardown.

I have checked and set valves clearances. .005/.006 I removed valves and cleaned them to good seat. Leak test showed 12% on #1 and 22% #2. I did notice the flywheel looks like it has moved but only more like it has squeezed the key not broken. Would that make it not start? I did make sure the timing dots matched before putting it back together. I have rebuilt 3 or for single cylinder, but this things has me scratching my head. (or pulling my hair out).

Replace the key.

 

[Todd Caulder]

Thanks. The key will be my next thing.

 

[derwoodii]

flywheel looks like it has moved but only more like it has squeezed the key not broken. Would that make it not start? I did make sure the timing dots matched before putting it back together.

i put a fly wheel on 180 ° wrong and my motor bike started & ran,,, but went back wards for few feet

 

[Todd Caulder]

Well that did not help at all. I did recheck the spark (late at night in the dark) and cylinder 1 shows spark but not near the spark cylinder 2 shows. Will that make it not start at all, or should it start on one cylinder and run rough? I guess I will get a couple magnetos and replace both of them. seems to be my last hope on this thing. We shall see.

 

[Frogfarmer]

The kill wire between the mags has a diode inline. Unplug the kill wire from both mags and see what the spark looks like.