H / W-4 Valve Adjustments

I have a '49 W-4 that I painted/restored a few years ago. The engine has always run smoothly and without smoke, so I never overhauled it.

I didn't have much opportunity to really plow with it until recently, and I've encountered a problem. Last year, after I had plowed for quite a while and the engine was good and hot, it started to pop and sputter and miss, and eventually it died. Then it wouldn't start until cool. So we adjusted the valves to what the manual suggested (.017?).

This year, it did the same thing again so my Dad adjusted the valves this time. Upon the third outing it started to act up just as we were finishing (we had less to plow this time).

Anybody know what's causing this? If it's the valves, what do you have yours set at?

Your help is greatly appreciated!

Eric
 

.017" is the correct setting for a "hot" engine. If you are setting the valves with the engine "cold", or even just slightly warm, you need to increase that gap to at least .020".
 
If that does not fix it, The same symptom is generated by a bad coil. Touch it (carefully) when it begins to sputter. If it is hot (very hot) put a different coil on it and see if it runs like a champ. JimN
 
(quoted from post at 17:59:23 05/29/09) If that does not fix it, The same symptom is generated by a bad coil. Touch it (carefully) when it begins to sputter. If it is hot (very hot) put a different coil on it and see if it runs like a champ. JimN
Bingo!
mike
 

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