Mr.Alvaro

Hi everyone in the forums, this is my first post here, but been here for a while always reading.

I have an old HPI Nitro RS42 4WD, powered by a OS Max 12CV. The engine has the backplate and the shaft that connect to the crankshaft on the back of the engine that allow to install a coil starter. The issue is the engine does not have it and after reading about coil starters I prefer to stay away because of how often they fail and became useless.

My idea is to have a roto start system but I have been looking around trying to figure out if there is any one compatible for this engine but I have not found any. The back plate has the 4 holes for the screws and those are separated 32mm or 1" 1/4. You guys know any roto starter that will fit for this engine?.

Also, the plastic fuel inlet is broke and I wonder if you guys know any metallic inlet that will fit for the 10E needle assembly. OSMG6993



One last question. I live in Chicago, and I am looking for a good place with an on-road track for this car. Any good place that you guys recommend?

Thanks.

1QwkSport2.5r

There will be two sets of screw holes in the backplate - 4 for holding the backplate to the engine and 4 holes for
holding the starter to the engine. Is the 32mm spacing listed for the smaller set of screws for the actual starter? If so, I may have something that will work, but I will have to look in my parts box. I think I have a Traxxas electric starter setup that may fit.

For the carb fitting - what’s the OD of the needle valve assembly where the fuel inlet fitting goes? I may have a metal fitting that will fit - I just need to know what the size of the needle holder is.

Mr.Alvaro

Hi again, sorry for the late answer, I went out of the country and just came back 2 days ago.

Yes, the space is 32mm for the starter set, so if you know any electrical starter of you have one we can talk business. Related to the carburator, I got the full needle assembly for the 10-M and its compatible so that issue is solved.

Waiting to hear from you, and again sorry for the late reply.

nitroveins

Can you still get parts for that engine?

Mr.Alvaro

Yes, I got the needle assembly for the 10J/10M Carburetor and it fits and work properly. Ebay is a good source for parts for RC, sometimes you have to spend time looking for it because the name does not match the part. Also I got a new back plate and the coil starter. Now I am waiting for a generic back plate compatible with roto starter so no more coil, no more remove of the cover of my car.