I’m an SS1 owner. Before I found a correct Flathead I purchased a 3.5 and then a 2.5 OHV engine just in case I never found one. Well, I found a Standard 20 HP engine but the front and rear engine mounting plates are not correct since the engine was originally in a Standard, not an SS.
The 2.5 has the correct spacing for the starter, but not the same mounts. My plan is to remove the rear plate from the 2.5 and fill in the rest with Autocad when doing the template.
Enclosed is a picture of the rear of my 2.5 OHV. I have nothing on this era engine for a manual.
Is clutch removal pretty straightforward? Any hints?
No different to any other clutch, does the Standard engine have a crank? the 2 1/2 flywheel should fit. If the Standard engine has a front mount plate fitted it should fit the SS1, post a photo.
and flywheel; they were balanced together at the Standard factory, note extra holes drilled and then an extra piece welded on for weight. Suggests this is probably the original pressure plate.
My bolts appeared to be a little over an inch measured under the head.
Broke one, missing one.
I’ll post a pic tomorrow. The pressure plate had some blue paint remnants, will wipe down to see if it presents better.
The flywheel, another story. Anything special I should know. I am guessing the flywheel is being held by corrosion. Liberal amounts of PB Blaster applied will attempt tomorrow, may grap a puller as the oak block I usually use did nothing.
Penetrating oil, patience, pounding with a rubber mallet. Looks like flywheel had four bolts, are there any alignment pins lining up crankshaft and flywheel that could be corroded slightly? Any chance bush in end of crankshaft for gearbox primary shaft is holding it together?
Thanks for the confirmation on bolt length. Mine were 5/16-BSF x 1/2" long, and I could not tell if they were original or replacements. They had blue paint on them.
What with subtracting the thickness of the pressure plate flange and lock washer, I felt there was not enough thread engagement in the flywheel, so I substituted 3/4" length bolts, all matching heads so there should be no adverse affect on balance.
Just to be redundant in communication, there may be alignment dowel pins for the clutch assembly to the flywheel and also alignment dowel pins for flywheel to crankshaft. There may be two alignment dowel pins for flywheel to crankshaft. Working a flywheel up those pins to freedom from the crankshaft can take a while. Good luck and patience to you.