Grshame, daughter has done a video of the two Alcons today it might be a time before i see how it came out, I can tell how long the one pump was in work to as stamped date in 2002 as that was when I resurrected the donor parts pump back into working order and used that, So stood twenty two years. Bit disappointed as had to give it two pulls before it fired up, flat out that you say they can’t run long like that and that now frightens me a bit but been doing that for now 70? years and still hanging in there. I then started the other engine and they take 5-10 minutes to prime so both had ben making some bit of noise and noticed I hadn’t dropped the old faithfuls hose into the water, so no wonder it was a bit more noisy, dumped the hose into the pond and it only took seconds it seemed and was primed so that is quick, but once up and running there’s no difference, think running just under 20 psi and doubled up more or less double the pressure. Just as I had nearly cleared up the friend that had put his rev counter on that old engine 50 years ago came over and he remembered the 4000 rpm. Both engines differ with the well used engine having a serial number ending in 40? date, and other has nothing, both were in the AM green the resurrected one still is what paint still there. just recently was give a few Jap bits and looks like was from a generator going by the head, tin cowl good no dents and sump, and if you find the loss of compression isn’t just a stuck valve and was a cam-follower I have a spare so all free to anyone.
