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willysmjeeps.com :: View topic - M38a1 running problem...brown smoke? With video
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M38a1 running problem...brown smoke? With video

 
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linx310
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Joined: Jul 05, 2009
Posts: 158
Location: Texas
PostPosted: Tue Apr 15, 2014 9:05 am    Post subject: M38a1 running problem...brown smoke? With video Reply with quote
After cleaning up my carb and attempting to get the float setting correct on my M38a1 I managed to get it to idle decently but when I blip the throttle it hesitates and then spits out a cloud of what looks like brown smoke.

http://www.youtube.com/watch?v=2G9kpU9h2GU

Now it could just be my eyes and the cloud is actually black but I am not sure.
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BullRun
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Joined: Mar 10, 2009
Posts: 459
PostPosted: Wed Apr 16, 2014 10:52 am    Post subject: Reply with quote
It does look brown! I am thinking it is rust from your exhaust system.
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wesk
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Joined: Apr 04, 2005
Posts: 16250
Location: Wisconsin
PostPosted: Wed Apr 16, 2014 2:04 pm    Post subject: Reply with quote
Generally the hesitation will be one of two causes.

1-Accelerator pump diaphragm bad or housing leaking.

2-Centrifugal (governor) advance stuck in distributor.

3-In some cases a too lean idle mixture will mimic the accelerator pump problem.
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45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

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