Thanks Guys
It was a right son of a bitch to get running it took three days of trying, some of the problems were down to my hamfistedness, I distorted the bore in the cylinder because I was clamping it to the base with over long screws, took me a while to work out why it was getting tighter and tighter, had to run the reamer done the bore to get rid of the tight spots.
And as was pointed out the cylinders were on the short side, I had sussed this out and increase the length by 2 mm, but that was hardly enough, so any of you guys who had the drawings off me make a note to increase the cylinder length by at least 3mm. I had to set the stroke using a depth mic to measure the top of the piston at forward dead centre, I only had about 0.2 mm clearance.
Then I went and seized the main bearings up twice running it in with a Black and Decker, the bearing stands were pulling off line when I tightened then down and causing the bearings to bind, I sorted that by running the reamers through the bearing whilst they were bolted down on the base.
The the connecting rod was just kissing on the cross head guide, just enough to stop it, that had a file taken too it, it was just a case of chasing down the problems one at a time, and being patient.
You never truly understand an engine until you come to put it together and this was no exception, it doesn't like any tight spots at all, it seems to be bedding in OK now getting better and better as it runs, only problem is my compressor is as noisy as hell and it starts the local dogs off barking, so to avoid complaints I only run it for short spells.
Stew
