Thanks for the replies. It was a 5/16 thru fitting on the splash guard I somehow mistook for a being a 3/8 and a cheap 5/16 primer bulb that would suck air through one of its bulb clamps at high fuel draw.
2 air leaks fixed. She runs great!
Now onto the next project. Went to relocate my...
I ran a line that bypassed multiple fittings as a simplified circuit test of sorts. line ran down fill tube directly to bypass pickup as well. From tank to a ball, filter and then straight to the pump. No change. pulse pump is kicking fuel. But seams meager and cant pull enough to keep the...
I reopened the carbs and found that carb one had one needle lever that was not pressed correctly and found it riding on top of the float. corrected the issue and checked other carbs to be sure. Checked to make sure they were all in spec. Minor adjustments needed. Removed the other 2 back draft...
Things I have changed
Dist cap
spark wires
fuel pump diaphragm
impeller
all rotten wires except for the 3 distrib wires and 2 stator wires
all fuel hose replaced with new 5/16 because the old 3/8 hose had 3 or 4 points of air leakage
pulse hoses changed to 50psi rated 5/16 fuel line
carbs...