i removed the backplate on my engine and i noticed rust on the crank is it normal. its a light coating.

never had that in any of my engines....

You obiously got some moisture in there somehow. Has it been sitting? Nitro will atract moisture.

not really i run it once every other week and ive been using after run engine oil.

what fuel

trinity platinum. me and my friend were just talking and we think we had a bad gallon inbetween us because he was having flame out issues with his car.

switch to something like byrons, OD, or werks. for taking the back plate off there is no oil in that motor; you wont need afterrun with a different fuel. trinity is crap

well i wont run od but im looking into byrons or werks. my only problem is driving 45 minutes to get a golon

I run byrons, and my engines are an oily mess, I doubt I would need after-run

well, there are 2 main culprits to rust.

moisture

letting nitro sit in the motor


never store ur r/c in ur car, garage, basement or anywhere moist or antwhere condensation is likely to build.

after running ur nitro car for the day. completly empty the fuel tank, start r/c to burn any remaining fuel in the lines and motor, put a few dropps of afterrun oil into head and crank it over several times to work it into motor, barrings, crank...etc, plug the stinger on the exhaust pipe, keep motor clean...leaving it dirty allows moisture to sit on it and work its way in.



these are steps you can take to keep ur motor from rusting but they are not fool proof. the problem is that moisture in the air from day to day differs and always gets in while running. just do what you can to control what you can.

lmao...but here is where your problem begins. nitro will eat your aluminum parts of the blck and such by leaving it in there like that. you will know that this is happening because your aluminum parts will begin to discolor....usually turning black.

im almost positive i read that quote from my vspec owners manual in the maintainance and care section.

i could take a pic and post if you like.

black is carbon build up, that is due to running rich and you will see that on the top of the piston only. You dont need after run oil, it really is pointless and will only foul plugs if u run a good fuel. Run the motor out of fuel and you are left with an oily mess, there is your after run oil. you just dont want to leave un burnt fuel in the motor that is what creates the rust

When Ive used after run oil seems like Id blow plugs on the next start

yeah I just pinch the fuel line and turn it over until it won't fire anymore mess created, problem solved maybe? Never had any problems...treat my engines the same way, and they have lasted me like 5-8 gallons.

yupp thats basically running it out of fuel