Need some help again...Johnston 150 no start

[edwar355]

Need some help again my Johnston 150 won't crank up. It will fire up every once in a while and run fine just like its suppose to. I know it can be a few different things. What I need is a list of what it can be and how to check each thing if someones got the time it would be greatly appreciated.

 

[Chris1956]

Re: Need some help again...Johnston 150 no start

Your post confuses me. Are you saying the motor cranks when powered by the starter, but doesn't fire? Does it start and run for a few seconds? What exactly does it do or not do?

 

[emdsapmgr]

Re: Need some help again...Johnston 150 no start

Either spark or fuel related. Try checking the spark first-fairly easy. Put an inductive timing light on each plugwire and check for spark. The flashes in the timing light gun will tell you if you have nofires, misfires, or weak firing. If spark check out ok, then go on to fuel issues.