Hot starts

[Barrydumoulin]

My 1977 A2 cold start is not an issue. However, after shutting down for any length of time (Like when I take her to the gym) and the do a restart, I have to crank the hell of if. I believe it is vapor lock (It is hot enough in FL) and when possible, I release the heat by leaving the bonnet (hood) open, but I can't do this in public. I am thinking of wrapping from the manifold outlet to the muffler as a start, I don't want to place a heatshield in yet. I had to do that with My 42 Ford GPW to keep the brake fluid from expanding. Thought it might be a choke issue, but I doubt that, Thoughts?

USCG

[rickf]

Welcome to the forum. I don't know how familiar you are with the M=151 vehicle so I will suggest this. Have you tried pulling the choke out for the first revolution of the engine during cranking? You have to keep in mind that the 151 carburetor is a vacuum operated accelerator pump so pumping the gas pedal before starting will do nothing to add gas for starting. When these are shut off the accelerator pump will shoot a shot of gas into the carb which generally lays in the intake tube and is there available for the next start. But if you sit ling enough that will evaporate and there is no gas available for the start.
Vapor lock is not a problem on most 151's, especially the A2's with the vapor return line. Another issue could be the float level in the carb but if it was running fine then I still say to try the choke and let me know how it works. Don't leave it lout for more than three or four rotations or you will flood it. You just have to remember that these are 60 year old technology engines, Not modern fuel injection where all you do is turn the key.

[Horst]

try to start it with WOT, pedal full pressed. That is what I do when it has an issue starting hot. (of course immediately get of the accelerator once it catches)

[Barrydumoulin]

Thanks all for the assistance on the hot starts. I will follow your recommendations and do a follow up post. Last night in a pool of sweat, I did wrap the exhaust pipe from the manifold down to the first clamp ending basically at the oil pan, figured it can't hurt and I had a whole roll left over from my 42 GPW.