Big Oil Change Oops

rpmerrill

Well-known member
Joined
Feb 5, 2016
Messages
608
Fluid Motion Model
C-28
Vessel Name
BAY RANGER
Big oil change Oops for me last night.
I did an end-of-season oil and filter change this week. All went well and the new oil sucker did a good job. Not a drop of errant oil went anywhere except on myself (as usual). When finished I ran the engine at low and fast idle at the dock for about 15 minutes. Quite satisfied with myself.

I'm holding off on the haul out for another week or two. Also gotta run down to my nearby fuel dock for a fill-up and pump out.

Last night before dinner the sunset was beginning to look promising, so off we went for a quick toot, just a mile of so down the river. A couple minutes out of the marina I decided to take a look. Oil was squirting out from the oil filter housing. I did a quick turn around and made a slow return to the slip. Watching the oil pressure all the way in.

I got out all my oil absorber sheets and immediately started wiping and stuffing the bilge. That stuff does a great job of grabbing the oil and passing the water. It just so happened that my oil sucker was still onboard. I used it to suck the bilge "dry". But still oily. I broke out the Dawn and Windex and continued the wipe down in every place I could reach and many places that I couldn't reach. What oil was left got loosened by the Dawn and the absorbers caught it before the bilge pumps. Ran the engine again. All looked good.

Then the diagnosis: I spotted an o-ring blowout at the filter cap. I pulled the cap off, looked at the ring. Everything was ok. reinstalled it carefully and snugged it up. Ran the engine and all was well. (Full speed run today.) What did I do wrong? Was the filter cap too tight, too loose or the o-ring not lubed. Looking for comments on this. I don't want to do that again!

One lesson: you can't have too many oil absorbers and a good 5 gallon bucket on board.
 
If you have the Yanmar engine the oil filter cap is required to be tightened with a torque wrench to its specifications in the manual. I've heard a story about a tech who did not do this important step and as a result the engine seized.
Good thing you checked things out when you did.
 
Thanks Brian. (Old Barrington kid here.)
I looked it up. Sure enough, 225 in-lbs.
I'll be going to the boat this AM with my torque wrench.
I'll be writing the #'s on the engine cover.
 
Always make sure that the old o-ring has been removed as well. Sometimes they get stuck behind and cause a big leak!
 
TomFin":3t55zios said:
Always make sure that the old o-ring has been removed as well. Sometimes they get stuck behind and cause a big leak!

Great tip! I had that happen on the primary fuel filter once.
 
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