300/440/550 Still having starting issues 89 js550

[krgrandy]

If i have strong spark, good compression, and use the primer to dump fuel in why won't it start? All that I get is one to 2 backfires out of the carb and that is rare.

 

[WFO Speedracer]

Whats the compression?

 

[3wheelerdude]

Timing might be way off. Or it might even be a loose or fallen stator.

 

[Bluegill]

If you are getting strong spark and good compression, try to dump just a little bit of premix in each cyl. it should start like that, even if it only runs for a second. the compression on my 550 is about 145 per cyl.

 

[cosander]

sheared woodruff key or loose stator. maybe weak spark

 

[krgrandy]

Sorry guys rookie mistake, i was using a faulty compression gauge. New gauge won't even read 30. Any suggestions besides new rings. Maybe good place to purchase them.

 

[cosander]

both cylinders read 30? could be a weak battery.

 

[SQUARE JOEL!!!]

both cylinders read 30? could be a weak battery.

Not holding throttle open while testing?????

 

[krgrandy]

battery is on trickle charge all the time and with throttle all the way open or closed read exactly the same. i ordered piston rings from sbtonline.

 

[krgrandy]

and yes both cylinders read 30.