TRX Pro.15 Rebuild
#1
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Join Date: May 2013
Location: Franlin , MA
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TRX Pro.15 Rebuild
Hey RC people... I was wondering, when I rebuild my Pro.15 is it necessary to replace the connecting rod, clips and wrist pin? I am going to order my parts soon because the engine likes to loose compression when its warm and no matter what I do (since like last week) it always over heats.
Another question, is a quart of fuel enough to break in the engine? I'm doing the five tank break in when I get the piston and sleeve.
Another question, is a quart of fuel enough to break in the engine? I'm doing the five tank break in when I get the piston and sleeve.
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It depends. The pistons in these little engines are so light weight, they really don't stretch rods like you see in a conventional gasoline engine. However, the bushings do wear, and cannot be purchased separately. I've rebuilt many with only piston and sleeve, but if the rod bushings are worn, I will replace it as well. On OS engines with the floating wrist pin, I replace it, but generally leave wrist pins alone unless there's a reason to change it out.
As for break-in, I typically do about 100 times the engine displacement. So for a .15 (2.5cc), that'd be 250cc of fuel, or about 3 tanks (most 1/10 tanks are ~75cc)
As for break-in, I typically do about 100 times the engine displacement. So for a .15 (2.5cc), that'd be 250cc of fuel, or about 3 tanks (most 1/10 tanks are ~75cc)