Author Topic: 175 crank case drain pipe dripping oil  (Read 1735 times)

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Offline ressetcruise

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175 crank case drain pipe dripping oil
« on: July 29, 2013, 12:48:24 PM »
I have a 1967 175 dual twin and after riding around for a bit and parking it i noticed it drip a few drops of oil on the driveway from both crank case drain pipes. I pulled the covers off to get a look at where its coming from and it seems to be dripping out of where the carbs mount to the engine. Is this normal or is something going on? It seems to be dripping the oil from the transmission and not dripping 2 stroke oil.

Offline OldSwartout

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Re: 175 crank case drain pipe dripping oil
« Reply #1 on: July 30, 2013, 08:27:02 AM »
There is an o-ring behind the right side engine cover around the spigot for the carburetor. If it is bad, transmission oil will get thrown out there during operation.  It will only be a small amount, but will make a mess.  Take the carb off, clean the spigot and the area around it with some brake or contact cleaner and smear some RTV into the area with your finger, pushing into the gap as much as possible and leaving a small fillet of RTV. Wipe off the excess where the carb mounts. Problem solved.  Or do it the right way, remove the cover and replace the o-ring. :)

I'm not certain about the left side leaking oil, maybe the oil pump drive cover gasket or more likely, one of the oil line fittings is leaking.
« Last Edit: July 30, 2013, 08:30:24 AM by OldSwartout »
Karl Swartout
Mooresville, IN
BS175 Roadracer

Offline ressetcruise

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Re: 175 crank case drain pipe dripping oil
« Reply #2 on: July 30, 2013, 07:30:37 PM »
I think I have it figured. Turns out when I reassembled the crank case I tightened it down by hand but never properly torqued the bolts, I'm restoring it with my dad and we each thought the other had torqued them down by the next day when we put it back on the frame and got it all together. *face palm* we're gonna be pulling it out since I'm going to be replacing the right cylinder jug within a week so I'll just let her sit till then.
« Last Edit: August 03, 2013, 03:24:45 PM by ressetcruise »



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