New built motor hard to start.

Wally Dog

Member
I just finished building a new motor. I'm trying methanol for the first time and purchased a meth carb from NR Racing. It takes quite a few pulls to get it started. The carb doesn't have a choke and I'm using an ultra light ARC flywheel. Is this normal for alcohol engines? Also, my timing might not be set correctly, would that have an affect on starting?. The flywheel comes at 32 degrees and I currently have a 2 degree offset key. Any advice would be appreciated. Thanks!
 

flattop1

Dawg 89
A light flywheel is not going to carry through the revolution's like a heavy flywheel .
What other mods cam and compression changes ?
Once started how does it run ?
Is it a modified clone/predator style float carb ?
Timing can affect it but would need too be out of whack 2 degrees should not do it .
 

Wally Dog

Member
A light flywheel is not going to carry through the revolution's like a heavy flywheel .
What other mods cam and compression changes ?
Once started how does it run ?
Is it a modified clone/predator style float carb ?
Timing can affect it but would need too be out of whack 2 degrees should not do it .
It is a modified predator style carb (stock appearing). F-275 cam. 28/32 valves, milled, high compression head. 1:3 gage rockers, 36lbs springs. Stock stroke/crankshaft. Dished piston has been replaced with flat-top. Once started it seems to idle fine. I haven't rev'd it up much yet as I'm not sure how much break in period it needs. I let it idle around 2000 RPMs for 20 minutes.
 
If its as cold where you are as it is here you may think about trying to put a torpedo heater on it for 5/10minutes prior to trying to start it. Otherwise the rag/bag on the filter is a good idea for a choke.
 
Top