Ofna Hyper .21 Engine Trouble

[frisp09]

Hi Guys,What it is i have R/C truck that i haven't used in 5 years. I went in the garage today to see if it still worked :\ And basically the pull starter was stuck solid so i took it off and a black substance pored out of the engine what i want to know is that some sort of special oil that i need to get some more of? Also i have the engine piston moving again.

Thanks for any help in advance..

 

[Ruhel™]

Isn't the nitro fuel already mixed with oil? May be oil+fuel from 5 years ago?
Have you tried just cleaning it all with nitro fuel and see if that helps?

 

[AB Mods]

I would take that engine down and give EVERTHING a good flushing and cleaning. Take the HSN and the LSN needle out and clean them off and also clean the HSN housing out really well. Also inspect the O-Rings in the carb while your in there for any drying or cracking etc.

You can just use a mild soap and water to clean the engine and scrub it using a tooth brush... Very simple tools here Dry it out very well before putting it back together with some after run oil to pre lube the internal parts.