unknown engine
 

need to know what type engine this is and where i can get a muffler and a small piece for the carb that is broken?the only writeing on it is 40 [img][/img]

RE: unknown engine
 

It's an older Fox engine.

RE: unknown engine
 

You can get parts from these guys: http://www.foxmanufacturing.com/

RE: unknown engine
 

actually one of the better RC motors from Fox.

RE: unknown engine
 

i went to that site and looks like where i need to be but i have no idea which engine it is???

RE: unknown engine
 

Looks like it has an early Eagle carb on it...that might date it sometime in the mid to late 70's...(the fuel line nipple is smooth/no "barb" on it )

Is the piston ringed or is it an ABC type?

RE: unknown engine
 

not to familar on how to tell that (kinda green at this) but looking thru the muffler hole there appears to be a ring at the top of the piston i got this engine from a friend of mines deceased father inlaw i helped him move some stuff and this was in the go to the dump box it has great compression i would like to get it back together and put it in something!

RE: unknown engine
 

I kinda figured it was ringed...

That broken off piece looks like the low speed stop screw...I think you could run the engine just fine with that carb just the way it is...just adjust the low/idle speed with your throttle servo trim.

Once broken-in, they are strong running engines.

Check out the "Club Fox" thread for more info on running Fox engines. (you now qualify as a member :D)

RE: unknown engine
 

Looks like a 1973 Fox 40. I need a Carb part same as on your engine. Wood you consider selling Carb or engine??

Cal
[email protected]

RE: unknown engine
 

Ihave this exact engine, PM me.

RE: unknown engine
 

You can buy a new carb from Fox Manufacturing that will fit your engine no problem. All of their flange mount carbs are interchangeable between the 40,45, 50, 60 and 74 engines.

But besides that looks like your idle stop or idle speed adjustment piece that broke off. it won't affect the operation of the engine. I haven't used that adjustment in like 30 years now anyway. I use the throttle channel trims or end point adjustments for idle speed via the servo.
So you don't need to fret about it much.

RE: unknown engine
 

The muffler is another story. I had to make an adapter for mine. I cant find a new connecting rod for mine so it languishes. It is otherwise like new. Iwould love to see it go to a good cause.

RE: unknown engine
 

The earliest .40 and .45 high back engines used a exhaust muffler hole spacing that was approximately 2mm more close together than the later engines had. Fox changed it after the first initial production runs.  So yeah finding a original early style muffler is a problem for them. But that early muffler wasn't all that good anyway, so it wasn't a big loss to not have one to use. About the only place that early muffler works good is for a Fox .45 diesel conversion. The diesel conversion doesn't result in a huge power loss from the muffler being so restrictive. Plus the diesel is more quiet than a glow engine too.  But what I did was make bridge adapters to convert the odd exhaust screw width size to some other size to fit a better muffler on the engines. If I remmeber right, at the time that Fox manufactured these engines, mufflers weren't a required item per se, so Fox wasn't including mufflers with the engines at the time. But it wasn't long afterwards that mufflers were being included though.

Now as to the connecting rod, there were two different main types, a smaller more narrow in width one for the bushed crank engine and a larger one for the ball bearing engine.  Now I do not remember if Fox changed the crankshaft size any with the ball bearing engines, but there is a good chance that the current rod would work with the older engines.  The bushed crank engines is another story though. Fox made the crankshaft a little smaller and the rod looks similar but is less wide as the crankpin is more short. The rod also had a very narrow slot cut in it for oiling the crankpin. But I think that one could file the rod down some to make it less wide and it may work. I have vague memories of messing around with that and then I found a rod, so I didn't persue it to its conclusion to see if it would really work OK or not.

I still have several of the old silver colored Fox .40 and .45 engines myself. Way back in 1978 when I visited the Fox factory I bought a bunch of engines from him in their small store inside. I am still working on trying to wear them out even today.

RE: unknown engine
 

The new crankshaft availabe for the B frame engines has a crank pin dia of .250. The crank would probably fit your .40 BB but the con rod will not fit the crank pin.

RE: unknown engine
 

Ihave so many engines that one little .40 size more or less is no big deal.

RE: unknown engine
 

I took a look in the AMEE book and it stated that the Fox big frame .40 and .45 engines were first produced in 1975. Fox made a bushed and ball bearing version at the time. Unfortunately the book didn't detail any crankshaft changes or differences though. I know the bushed engine crankshaft is slightly different from the ball bearing version. But I don't remember them changing anything else over the years with the crankshaft.