Stored engine - some advice...

[pjmcburney]

Not strictly a GT, but two-stroke related nonetheless...


I'm currently in the process of building up an RZ350 engine out of the surplus stock in my shed.

I have what seems to be a decent short-motor. I have to use it because it matches the frame to make it a complete, original 350 (the 250's and 350's are identical except for the engine top-end essentially).

There is a fair amount of old oil in the crankcase of this engine (good) but it appears to be emulsified somewhat - it's pretty milky lookin' .

Question is, should I attempt to wash all the old slightly emulsified oil out (and if I do, with what?), or will it essentially burn off when I start the engine?

I'll take a couple of pics tonight...


Cheers
Paul

[strainer]

delete

[TLRam1]

I would wash with kerosene, refill with inexpensive oil, run it for a bit, dump than refill with what you want.

[pjmcburney]

Thanks everyone for the input so far .


But, I think my original post may have been misleading - when I said crankcase, I actually meant beneath the cranks, not the sump/gearbox...

The residual oil that I'm talking about is two-stroke oil left over from the last time the bike was run - it appears on the cranks themselves when the engine is turned over.

So, even though it may have emulsified a bit, can it be burned away when the engine is started?


Cheers
Paul

[oldjapanesebikes]

I'd be inclined to wash it out and also take a good look at the crank.

Usually emulsion = water = corrosion. You don't mention how much emulsion we are talking about, but I'd want to check the bearings for pitting, and I'd also want to just take a peek at the underside of the throws to see if there is sludge. Just my two cents worth