RE: Glow Motors spraying fuel from front bearing
Kevmac,
Like Jim wrote, the spray from the engine's front (runny nose...) is a tell-tale sign of an ill fit between the crankshaft front-rotor and the crankcase boss, within which it spins.
Unlike full size engines, a leak from there is not really a malfunction and at worse, it may make your engine difficult to shut-down with the carburettor (and will dirty your plane more).
Using a sealed bearing will not make the engine run any better.