ORIGINAL: xup1234
I have a hyper 7 .21 motor. Pull start broke, im using bump box. I noticed it is leaking fuel out from the motor somewhere. Im runnning byron %33 nitro and %16 lubricate. Could be coming from the broken pull start? Do you know where you can get a blank back plate?
Small fuel leaks are actually normal. If it's leaking pretty bad at the exhaust port, then you may need a new gasket, or the pipe isn't seated against the block very well. You may want to look in between the head and block, make sure it's not coming from there and running down on the back of the engine. If so then re tighten your head bolts. If you are using a bump box, then by all means order a non-pull start back plate, and completely remove the pull start assembly. This will make your engine happier as far as tuning, power, and temperature. Here's a link to a non pull start back plate; [link=http://www.nitrohouse.com/catalog/product_info.php?cPath=34_134_283&products_id=1315 2]hyper back plate[/link]