Quote:
Originally Posted by Smagu
Hello sorry should have said. That’s how I filled it but put the screw back in the top hole to see if it would hold pressure. Could the pressure of me pushing (not overly hard) have damaged the ring? Or would it simply bypass then be ok again?
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What you typically have is an o ring around the housing itself that slides into the leg casing. That part seals itself mainly by being a snug fit but on an old engine there is no harm in pulling the housing and giving both surfaces a good clean and smoothing with emery to ensure not just a clean fit ease of future removal.
From your description however, it seems like oil is bypassing the seals around the prop shaft? These are typically a steel washer and a steel springy ring encased in an open top rubber ring. They usually sit in pairs and will typically need to be the right way around.
In theory, pressurising the gearbox would push oil out. It's simply a question of how much pressure. You also have the pair of oil seals in the water pump plate for the drive shaft and you'd imagine that all being equal that under pressure the air would escape through there before oil out the other?
Anyway, if you were applying the pressure using the typical sort of oil syringe then I don't think you'd expect to see any leaking. The real clue though will be the oil. If there is any emulsion then you know you have a leak but you don't know if it just started in the last hour of running and will get worse or if it's been a minuscule weep since you bought the engine.
The other thing that you don't know is whether it's the oil seals that have perished or if you've had corrosion in the housing.
It does sound as if like me, you've bought an early 90s engine that at least the previous owner has never maintained. My engine was very clearly low hours but had also very clearly lived it's life wired into a dinghy that lived on davits, had never been flushed, hadn't been serviced for some time and had clearly lived without anodes for a period.
I'm also guessing that you've hesitated in doing the right thing and taking the leg apart after purchase because of the risk of bolts shearing but it seems to be that you've reached the point now where you need to. When you changed the impeller did you go deeper and inspect the oil seals at the top? They might also be perishing.
I'd bite the bullet, get the parts page, check the main parts are in stock somewhere and then strip the leg down and clean it all up, as Steve says, wash it and flush it all in cheap car engine oil before putting it back together comfortable that it'll now last far longer than you will own the engine for.
If you haven't already been able to do it then it's probably smart to replace the thermostat, fuel filter, pull and clean all connectors and also whip the carb off and give it a wash as you mention earlier that you've had several issues over the season. So long as you have good and equal compression on the cylinders than even the scabbiest of unloved 2 strokes can generally be made to purr like a kitten and be bulletproof.
spy-sea-one
BLACK PIG
Piglet
