Discussing it with a mate last night, he gets a lot of stuff laser cut and we decided it would be easier to get 2 pieces cut, one piece 3mm thick with a hole to suit the boss and the 12 mm piece with a hole bigger than the socket that fits the crank nut and then weld these together on the outside and that way you don't have to do any turning to get the nut to fit. Just have to see how much they will cost and how many I/we are going to need. The more you get cut the cheaper they get, but how many of these PT machines are out there and is it all worth the effort. At least we now know the fix if anybody comes here having problems with one.
That sounds pretty good Just need to work out the diameter needed to get enough weight.
What about maybe Rover blade disc . I doubt you would have room for the whole disc but a turned version or 2 might work I think the nut and wavy washer a 3.mm disc plus the pulley would all fit with nyloc still working.
Yes Jeff, not sure how I can work out the weight out I night be able to use a 1 inch undrilled flange if I can find them, they would be fairly cheap and I could then get the 3mm discs made the same size and just weld them together. The OD is not critical because I think I could go up to at least 200 diameter without any issues. As long as I end up with at least 800 grams +
Hi Steel is 7800 kg per cu m. A 200mm disc, 25 mm thick should weigh 0.1 X 0.1 x .025 x 22 / 7x 7800 About 6 kg unless I have missed a decimal point or something
Ok so now the big question, am I a mug or am I up for the challenge.This morning a bloke brought over a 24 with no motor on it, somebody had fitted a Briggs on it but he wants a 2 stroke fitted. Am I game enough to try a PT or just fit an F/C and not complicate the issue
Well NK, since you have made some inroads into solving the kickback issue and the bolt pattern is likely compatible with one, I'd use this as the chance to see if you can get a PT to work on a super duper 24.
Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!
We have been able to get a PT to work reasonably well on s FC 24 Be better with more weight on the motor pulley. Bit it's quite a big job which only is worth it if there are no FC's around. If you could get hold of one of those high output PT's might be different. Late. model, straight. manifold etc
If I was converting another FC 24 to PT I would mount the engine straight not crossways like I did.
Hi Jeff, The base dropped off here yesterday is one of the later ones that I think a PT should bolt straight on. It had the adapter plate to take the F/C but had had pieces added on to take a Briggs
Yes Max, that is what I will do, I can try the PT idea some time in the future when I have play time. Anyway this is my way of doing a pulley for the F/C. I think the pulley that came with the base may have originally been off a F/C but had been bored out to 7/8inch and a Rover blade boss welded to it. I cut the boss off, then turned a F/C boss down to fit the 7/8th hole, heated the pulley and pressed the boss in so now it fits straight on the F/C shaft. At least this gives me an option to make pulleys up for the ones I build in the future Hi Jeff, Many moons ago when you were setting up the PT on your 24 I came up with a measurement for you from the underside of the base to the belt. Do you have any idea where I can find those posts, problem is there is so many posts regarding these 24 it is difficult to find them. Might have to go and buy another one so I can measure it, there is 3 kicking around at the moment but they are all a fair drive from here
