Home › Forum › Ask A Member › Evinrude model 145 › Re: Evinrude model 145
I echo Tom’s comments about the waterline fittings. They look like standard hardware store variety 3/8ths compression nuts, but for some goofy reason, Evinrude used ones about .050 undersize. I machined all new ones for my ’29.
You MUST find the correct prop with water holes in it in order to achieve proper cooling if you plan on running it anything other than wide open where water is forced through the inlet holes. Carburetors are fragile and hard to come by so be careful when disassembling and assembling. Do NOT over tighten the high speed needle housing or the low speed nut. It will easily strip the female threads in the carb body—-and that applies to all carb fittings.
Piston skirts often have chips in them and they need to be filed smooth. The wrist pins are held in with cotter pins and for some reason the cotter pins might be undersized. I think that happens because the holes in the piston boss and the wrist pin holes do not always align perfectly. What I did was to align the wrist pin holes perfectly with the outer boss’s hole and then ran an aircraft (long) drill through to open the inner boss’s hole in alignment. Then I used, and I think it is a 5/32nd drill I used, a 5/32nds cotter pin for a really tight fit. Undersized cotter pins allow the wrist pin to rock and slowly eat up the cotter pin.
I’ve had 3 pre-1930 Evinrudes with the pistons in upside down. Check that also. Oh, and one last thing…..the steering handle adapter mounted to the bottom of the crankcase,—-make sure those 2 bolts are tight! They have a tendency to loosen up and eventually wallow out the holes and threads.
George