Recently purchased. Started and ran fine. Removed body pieces, cleaned and power washed chassis, engine, etc. Covered carb with plastic bag. Turned over, has spark but would not start. I drained gas from fuel tank and carb and replaced with fresh. Still not starting. Any help appreciated. I didn't get a manual so also have a couple questions... plug gap? And type of oil?
thank you!

 

Engine oil is SAE20W-50, spark plug gap 0.024" to 0.028" If you are getting a good spark and the carb is OK, the engine should start. Try a new plug, just in case. Check compression if you can, though why the compression would have gone after washing I can't imagine.

I got the Kazuma manual as a free download from the net, can't remember where and you don't seem to be able to send .pdf files via this site.