We do all we can to avoid basket case engines, but every once in a while, the parts on it require the effort anyway.
I picked up this Lighted H35 from a 1969 Rupp Scrambler project a few years ago. The entire project and of the parts had been media blasted (I think with sand), but the engine looked pretty good. No pitting to be seen, good compression and spark, and as a bonus, it's a lighted H35.
I finally found some time today to go through it. The bore is really clean but during the rotation, it seemed to make just a little too much noise. I planned on redoing this engine anyway, so I took the side cover off. The crankshaft is pretty bad. Not on the rod journal where you'd suspect. It's actually grooved on the crankcase cover journal. It looks like something got inside there and just wreaked havoc.
Both parts will need to be replaced. I have the cover, but I don't have another 5/8" untapped crankshaft laying around. I probably should replace the crankshaft anyway since it has a groove worn in it from an improperly installed set screw. Looks like it just free spun several times over the years and nearly cut the end of it off.
I picked up this Lighted H35 from a 1969 Rupp Scrambler project a few years ago. The entire project and of the parts had been media blasted (I think with sand), but the engine looked pretty good. No pitting to be seen, good compression and spark, and as a bonus, it's a lighted H35.
I finally found some time today to go through it. The bore is really clean but during the rotation, it seemed to make just a little too much noise. I planned on redoing this engine anyway, so I took the side cover off. The crankshaft is pretty bad. Not on the rod journal where you'd suspect. It's actually grooved on the crankcase cover journal. It looks like something got inside there and just wreaked havoc.
Both parts will need to be replaced. I have the cover, but I don't have another 5/8" untapped crankshaft laying around. I probably should replace the crankshaft anyway since it has a groove worn in it from an improperly installed set screw. Looks like it just free spun several times over the years and nearly cut the end of it off.
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