Originally Posted by
Franchize04
I'm having problems starting my new GX-5R motor. I just finished break in but it turns over and over but doesn't want to crank. When it finally cranks it acts extremely lean at first. When its running its perfect. I took the fuel line off the carb and primed the engine and the line spits fuel but when its connected it acts like its not getting any fuel. I'm still in the trouble shooting stage. I've changed the fuel lines and pressure tested the tank. The gasket in between the pipe and the manifold has a little leak, it gets wet from all the priming I'm guessing, but it doesn't seem to be a material amount. Am I over looking something with the carb?
Check the head bolts and pinch bolt screw and make sure they are tight. With a new motor the heat cycling during break in can cause things to bed in and leave the 4 x head bolts or the pinch bolt retaining screw a little loose - resulting in air leaks. Maybe check your idle gap too, and make sure itīs not too big (.7 mm is good).