Allis Chalmers D 17

My D17 will only produce power at low RPM. At high RPMs it powers out. I have cleaned the carb. and tuned the engine. It sounds like a governor problem ie. fuel restriction, but why does it only happen at high revs? I would appreciate any assistance in this.

Thank you,
Rob

Robert

Check timing, air intake or exhaust restrictions. Also, make sure you gapped the points correctly. Does this happen even when engine is cold or does it run for 10-15 minutes before you see the problem? When it does happen, quickly disconnect the fuel line at the carb and observe the flow--which should be pretty steady. If not, then you have a fuel restriction in the tank or in the filter.

I'm no governor expert but that may be the problem. You can try setting the throttle say, at about 800 RPM and then start out in high range, 4th gear. Have someone on the ground observe the governor linkage to see if it adds fuel to take the load on the engine. At least you'll know if the governor is trying to work.

Hope you get it straight.