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ihscout 
Bronze Level
Joined: 12 Jul 2011
Location: Northern CO
Points: 147
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 Topic: Loss of power B
Posted: 15 Dec 2016 at 6:30pm |
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My 40 B all the sudden lost a lot of it's engine power yesterday. It sounded as though the exhaust system is clogged somehow. I pulled the intake / exhaust manifold and found a couple of cracks in it. Welded those and reassembled. No change. Any ideas as where to go from here?
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'40 AC B - My Pappy always told me "Use your head for something other than a tack hammer!" I did. It makes a great 16 pound sledge hammer.
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Ted in NE-OH
Orange Level
Joined: 12 Nov 2009
Location: Austinburg OH
Points: 1703
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Posted: 15 Dec 2016 at 6:50pm |
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Is it hitting on all 4 or you missing spark on 1 plug. Check for good fuel flow at carb.
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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914
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Randy WI
Orange Level Access
Joined: 22 Jan 2014
Location: Ogema, WI
Points: 825
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Posted: 15 Dec 2016 at 7:03pm |
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check your air filter may have a mouse nest or some other thing plugging it up. Randy
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Bill Long
Orange Level
Joined: 12 Sep 2009
Location: Bel Air, MD
Points: 4556
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Posted: 15 Dec 2016 at 7:36pm |
I do not have all the particulars but usually when a tractor loses power under load my first suspect is - cheap, the condenser, more costly the Coil Can't have my favorite not running well. Let us know how it goes. Good Luck! Bill Long
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ihscout
Bronze Level
Joined: 12 Jul 2011
Location: Northern CO
Points: 147
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Posted: 15 Dec 2016 at 7:57pm |
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It is hitting on all 4 cylinders and the air filter is clear. I just put a newly rebuilt magneto on it this summer and have very few hours on that. It doesn't reach the higher RPMs as it did a day ago. Would the governor have anything to do with it?
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'40 AC B - My Pappy always told me "Use your head for something other than a tack hammer!" I did. It makes a great 16 pound sledge hammer.
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Eric B
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Joined: 09 Feb 2012
Location: British Columbi
Points: 965
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Posted: 15 Dec 2016 at 8:30pm |
 Would the governor have anything to do with it?
[/QUOTE wrote:
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You could disconnect the rod to the carburetor and manually throttle up on the carburetor linkage itself to see if that makes a difference.
Edited by Eric B - 15 Dec 2016 at 8:32pm
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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cpg
Silver Level
Joined: 10 Jul 2015
Location: Michigan
Points: 246
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Posted: 16 Dec 2016 at 8:32am |
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Could also check to see if your mag bolts came loose and the magneto rotated. If the timing adjustment you can do by rotating the mag gets off and retards the timing it will seem like its lugging or loaded at full throttle even when its not.
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