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I am thinking of swapping out the carburetor on my "M". Yea I know BLASPHEMY!!! I am looking along the lines of serviceability and possibly performance. I did a swap on my Willys M38 using an adapter and a Rochester 2bbl. It was a slight improvement. I only did this as my original carb had a melt down (backfired and burned. Man was that an exciting few moments). The 2bbl route was cheaper at the time since I had the parts laying around. Replacing the oil bath filter is not a concern. I want to keep it simple. Any suggestions...John

Backfires and their associated carb fires do get your attention, don't they?

If it ever happens again, don't panic. Keep your foot off the gas, turn off the ignition and stomp on the starter. It will suck the fire down into the cylinders. If it becomes a recurring problem, you may have to reset your timing and/or check for burned valves.

I was outside the vehicle adjusting the timing when she burped. The first thing I tried was what you suggested. Evidently I had a fuel line crack from working around it during a filter change. I managed to get my shirt off and smother it. It is amazing how quick things melt. Oh well I didn't have to shave my eyebrow for a while. God how I hate stack fires...John

Of course the first swap would be the civilian Carter Ball & Ball. I have heard of one other the bolts right up. Tom

Seaking of carbs. How much of a job is it to rebuild a stock carb for the M37 ? I've done a bunch of civilian carbs over the years. Is it really hard compared to like a Ford 2 barrel?

I got the kit from John At MW.... some guys said it took them 4-8 hours. I do not have the place inside to stink up the house. There is a guy in Florida that rebuild, comes highly recommended, for $195.

Waiting for mine to come back but photos of his work are impresssive.

rixm37 wrote:How much of a job is it to rebuild a stock carb for the M37 ? I've done a bunch of civilian carbs over the years.

You sound experienced enough to tackle the job. Should be a "walk in the park" for you.

rixm37 wrote:Seaking of carbs. How much of a job is it to rebuild a stock carb for the M37 ? I've done a bunch of civilian carbs over the years. Is it really hard compared to like a Ford 2 barrel?

I did it this winter it is a bit more complex than old tractor carbs but not as complex as more modern auto carbs. Alan Bowes' carb overhaul instructions are very comprehensive. I did not mess with the governor. I will see how it runs first.

I have carb kits here for $35.00 Tom @ Snake River

OK just got back from another work trip. Thanks everyone.
Sounds like the carb rebuild is not too tough. When I get caught up on a couple of other M projects I think I will give it a go.

Rebuilding the carb is pretty straight forward. Once you get it off. Took me a couple hours or so... over 2 days, as some intelligent person had stripped several of the screws and they had to be JB Welded... but pretty simple nonetheless if you are familiar with carbs.