You might try J3 Competition’s website.
There actually was a very nice manual that came with these engines, frankly nicer than the engine itself.
Fuel mix 16-1 (8oz per gallon) and as far as battery goes any 12 volt that will fit in the box.
Greg Wright
Rapid Racing Inc.
Greg Wright
Rapid Racing Inc.
Vintage B-Stock Pilot
"When in doubt Gas it, It won't help but it ends the suspense."