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I've got what I think is a model year 2007 F115. I purchased it on an '09 boat that I bought new in Jan. 2010. The motor had 0.5 hours on it at the time.
It has about 630 now and runs well, but it has historically "made oil". I know this motor likes to run in the upper 4000's and when I can do this, it is fine. But during the offshore season (August - Now), it is hard to run hard in big seas.
Yesterday in the bay, I noticed what looked like a slight oil slick coming off the motor. It was hard to tell if it was from the engine, or dirty water. I fished the bay so I could run it hard. I got about 45 minutes of WOT and it seemed very smooth and sounded normal.
When I got home I pulled off the upper cowling and noticed some oily residue on the left side. The oil level was up slightly and smells of gas. I just changed it 20 hours about for the same reason...
I rinsed the inside with some saltaway and let it dry then hit with Boeshield.
I store the boat on the trailer and trim the motor to a vertical/normal running position. After a few hours, I can see what looks like a little oil coming out of the lower cowling on the left side. I thing flushing the inside with salt away encouraged more drainage...
My question is, what vents to the lower left cowling for drainage? Is it from inside the main compartment? I need to track down this leak, so first I want to know where this might be coming from. Maybe from the top area draining, or would it be lower in the engine.
Thanks,
Steve
It has about 630 now and runs well, but it has historically "made oil". I know this motor likes to run in the upper 4000's and when I can do this, it is fine. But during the offshore season (August - Now), it is hard to run hard in big seas.
Yesterday in the bay, I noticed what looked like a slight oil slick coming off the motor. It was hard to tell if it was from the engine, or dirty water. I fished the bay so I could run it hard. I got about 45 minutes of WOT and it seemed very smooth and sounded normal.
When I got home I pulled off the upper cowling and noticed some oily residue on the left side. The oil level was up slightly and smells of gas. I just changed it 20 hours about for the same reason...
I rinsed the inside with some saltaway and let it dry then hit with Boeshield.
I store the boat on the trailer and trim the motor to a vertical/normal running position. After a few hours, I can see what looks like a little oil coming out of the lower cowling on the left side. I thing flushing the inside with salt away encouraged more drainage...
My question is, what vents to the lower left cowling for drainage? Is it from inside the main compartment? I need to track down this leak, so first I want to know where this might be coming from. Maybe from the top area draining, or would it be lower in the engine.
Thanks,
Steve
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