Ok, I've dismantled and cleaned the low pressure side of the fuel system. I haven't replaced the fuel filters yet as I'm not near anywhere at the moment that I can get them. But was told they were new when I purchased the tractor and its only done 80hrs since then, so I cant see they'd be the problem.
The fuel tap/bowl did not have a screen on it - I was hoping this being clogged would have been the problem but no joy. There was a bit of crap in the fitting which screws into the tank but not enough to cause a problem. I dismantled the lift pump as well. I put it all back together and made sure everything was tight. If i remove the pipe that feeds the injector pump, I can pump the lift pump and get a small stream of fuel coming out so there didnt appear to be any major restriction.
I took it back out to the field with the mower and got about 30m before it started losing power and stalled again - bled the pump and got about another 20-30m and same thing. If anything its worse than before!
My lift pump has always been a bit weak I thought - whenever I've had to hand prime it just didnt seem to move a lot of fuel with each pump and I can never get a good spurt from the bleed screws - just a dribble, could this be a problem? It certainly sounds like a fuel starvation problem, I can drive it all day long at lower revs/load, it just seems to be at load ~1300-1500rpm that it dies.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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