justin_92_92

My Feedback: (2)

Is it ok to bolt a engine to a board or something and run it under no load? I ask because I have an engine that when started revs full bore and it chewed up a spur gear...I want to fix it without any more breaking.

Also, how could you tell if your clutch shoes are bad? The bellhousing is oblong, I noticed...this is probley a bad thing rite?

matts6887

Well, I would say it sounds like something could be up with ur clutch shoes, but, a picture or 2 of the actual clutch shoes that are in question would help to determine things easier. As for whether or not its a good idea to test a engine NOT under any sort of "load", well personally imo, no its not a good idea to do that, especially if its able to "free-rev" like that becauase letting a engine do that can damage the connecting rod due to it being under stress...

DaveG55

It's not a matter of opinion. Running an engine, any engine really, without some kind of a load is bad, no - very bad for the engine. Doing so is a real good way to have a runaway and totally destroy the engine.

As for your clutchbell, yeah, oblong is bad.

justin_92_92

My Feedback: (2)

Thanks for the heads up guys..Yeah i dont want to ruin this motor, if it isnt already. But mostley I want to be safe.

The bell is oblonged and not sooo smooth on the inside wich I believe it should be. These are the pics I took. If you need any other shots please let me know and I will get them.

But the clutch shoes and the bellcrank would have nothing to do with the engine reving out to max rite? I have no clue the factory needle setting so i am just guessing where it should be. Kinda trying to keep it rich. Its a tawain GO .18 its a no namer.

matts6887

Those clutch shoes look ok to me, as long as the spring that goes around the 2 shoes is fairly tight, then it should be fine....if the spring is kinda loose, then u probably should replace the spring....

dkastil

this might sound dumb but check your idle screw you only want about 1 mil give or take and you say you are running ritch , but if the low speed is lean it will rev verry high at idle, one other thing is if you have a air leek it will give you a artificial lean situation because of the air getting in , and you stated that the bell was oblong so it might have been in a big impact so a berring might be torked a bit letting air in the engine .

justin_92_92

My Feedback: (2)

Yes it actually was in a big impact. This thing went full bore through a few yards and rested in a small pond. I also did find an airleak in the copper glow plug gasket. I would love to test this thing out again with the idle screw adjustment but fear I will break another part. And this is a no name truck where parts are not easy to come by. The bellcrank is alot bigger than any traxxas one I have seen and the stock part is backordered.

This is why I wanted to try running the engine with no load (Bech test) so i dont break anything else.

DaveG55

Then figure a way to bolt an airplane propeller to the crankshaft. That's the usual way a load is added to a bench tested engine. And when you start it, be ready ahead of time to shut it down in a hurry - if need be.

Oh, and if you do try it - BE CAREFUL