Need help on starting problem M38

henrydes · Post by **henrydes** » Fri Apr 06, 2012 5:34 am

My 51 M38 was hard starting..low compression..had motor rebuilt..new carb and fuel pump... Now will start quickly..runs great..can stop and start it when hot..but if I wait two or three hours it wont start. I have tried to start it and checked the plugs and they are dry. Ive done and checked everything I can think of...Need help...

Post by **wesk** » Fri Apr 06, 2012 11:34 am

Next time it won't start after a 3 hour shut down (heat soaking) remove the carb air horn and see what the fuell level is in the bowl. If it's empty then it has either leaked out through a crack or it has perculated out becuase you are either missing the thick insulating spacer that belongs between the carb base and the manifold or you have a heat riser that is stuck in the full heat position.

henrydes · Post by **henrydes** » Mon Apr 09, 2012 5:30 am

I learned the hard way...Make sure that your choke plate is closing all the way.

jimm · Post by **jimm** » Mon Apr 09, 2012 4:20 pm

Speaking of stuck heat risers, are there any tricks to getting them unstuck other than the usual penetrating oil, patience, and judicial percussive persuasion?

Cacti_Ken · Post by **Cacti_Ken** » Mon Apr 09, 2012 8:06 pm

My engine does not start quickly either.
I always have to pump the dash primer pump to get it started right off.

I am not sure if I have that correct insulator either.
Is this the piece that has the "V" metal difuser in it?

I do have that installed.

Post by **wesk** » Mon Apr 09, 2012 11:09 pm

Yep that's the pice.

Need help on starting problem M38

Need help on starting problem M38

M38 now starts all the time