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Thanks for the confirmation on the pump key, second time I have heard that now. I have not had mine apart yet to advance the timing, so by just seeing the MW pump on eBay pics, one can clearly see the key slot. Can be deceiving. The mechanical engine mounted lift pump is supposed to be able...

Thanks for explaining the keyway deal. It didn't make sense. As a separate thread or PM, could you explain the procedure to check and adjust injection timing on the 6CTA8.3 with the MW pump? Quickserve only describes the method above. Myself and several others here are curious as to how to...

We are going through the IP timing right now on the performance thread for the 8.3. It does not look like anybody has messed or had to mess with it yet. You could be the first. The Cummins Quickserve online service manual does not signify a difference between timing the 7100 or MW pump...

My last ditch effort would be 2 items: 1. Remove one of the large plugs on the governor side case, and crank the engine, see if the pump is spinning at a rate you would expect it to be (1/2 engine speed). You should be able to see the governor springs rotating when doing so. 2. Pull the tach...

Good call. Quick test is to pinch the return line shut with Vise-Grips and try a start. Don't let it run long if it fires. The pinch-and-release when running is a shade tree way of cleaning this OFV. It is located in the banjo bolt on the return line fitting at the pump.

There has been one case here where the fuel shut off lever itself on the pump was not grabbing the control rod that goes into the pump. So, the stop lever was rotating on the outside, everything looked correct, but it was found that the lever was not actually rotating the rod that goes into the...