Originally Posted by race raider

I have been trying to help my brother tune his extech .21 we just could not get it to stay running no matter what we did we sealed the engine replaced the fuel tank checked the fuel lines and changed the glow plugs nothing worked so today we broke down the engine and we find a bunch of silicone in it looks like it came out of the crank. I have a couple of questions first will the engine run ok with out the crank being filled second do you think there is any damage to the engine I checked it and I dont see any. has anyone had this problem. thanks for any help