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stumped on a 45

A

ac_owner

New User
I have a WD-45 that has me stumped. It wants to pop/stall around unless you pull engine under heavy load. I have many other WD’s and 45's around but never been so stumped as on this one. It has new gas, tank cleaned, rebuilt carb(which was clean inside when i rebuilt) new plugs, wires, points and condensor,dist.cap and rotor button. Head pressure is at 140 on all cylinders which is good as manual states 130. ANY IDEAS??? It was doing the very thing before I did any of the above. Thanks ahead of time for your input.
 
check your timing, both for the distributor, and valve timing. might have jumped a tooth on timing chain/gear or distributor got moved, most likely dist. somehow got moved.
 
The wd 45 has timing gears verry hard to jump time usually stripps several teeth and will not run at all. Sounds like burned valves or beaten up stock valve seat from years of use on unleaded gas to me.
 
Well compression says nothing wrong inside the engine. Carb maybe still need more work or adjusted some. What happens if you choke it?? Have you checked and serviced the air filter?? The air cleaners are probably the most neglected part of a tractor
 
Sounds like unsteady dwell caused by worn distributor shaft/bearings. Check for steady dwell using a dwell meter, or check distributor shaft for bearing play.
 
Thanks for the input. The air cleaner baffles are clean and is sucking air as should. I leaning toward the head problem or distributor. I'll have to do more checking.
 
This sounds unusual to say the least. I once rebuilt a WD and replaced all the things you have. It seemed to have a random miss with no load, fast or slow idle. It ran fine under significant load. I pulled the manifold and resurfaced - no effect. I pulled the valve cover a readjusted the valves - no effect. Finally, I pulled the new Champion spark plugs and replaced them with the old AC45 plugs that I'd pulled out during tear down. It fired up with the Old plugs and never missed again. I took those Champion plugs and put them in my 8N Ford (flat head engine). They miss some in the 8N but much less and good enough to use the tractor. It is still a mystery to me.
 
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