Hi everyone,
Recently I noticed a damp patch on top of the crankcase on my 912uls [s/n 4428028 Spring 2002].
With SB-912-029 in mind I went looking for cracks but didn't find any.
After a 25 min ground run today I tried to see the source of the leak, initially there was nothing and then, after about 5 mins, I saw a droplet very slowly appear from the crankcase join on top centre. It was just enough to wet the top of my finger when I wiped it away. Then another droplet appeared appeared and I wiped it away again and so it went on.
During the ground run I could only get max RPM to 5050. Previously I had prop pitch adjusted to get 5300 RPM at full throttle stationary on the ground.
I checked prop pull through force with the engine cold and got a figure of 32 ft/lbs.
I checked it again immediately after shutdown and it was only slightly higher at 37 ft/lbs.
This was without removing any spark plugs.
The engine starts easily and runs smoothly.
Any opinion or advice on the above would be greatly appreciated.
Shay.
Recently I noticed a damp patch on top of the crankcase on my 912uls [s/n 4428028 Spring 2002].
With SB-912-029 in mind I went looking for cracks but didn't find any.
After a 25 min ground run today I tried to see the source of the leak, initially there was nothing and then, after about 5 mins, I saw a droplet very slowly appear from the crankcase join on top centre. It was just enough to wet the top of my finger when I wiped it away. Then another droplet appeared appeared and I wiped it away again and so it went on.
During the ground run I could only get max RPM to 5050. Previously I had prop pitch adjusted to get 5300 RPM at full throttle stationary on the ground.
I checked prop pull through force with the engine cold and got a figure of 32 ft/lbs.
I checked it again immediately after shutdown and it was only slightly higher at 37 ft/lbs.
This was without removing any spark plugs.
The engine starts easily and runs smoothly.
Any opinion or advice on the above would be greatly appreciated.
Shay.
912ulsweepfromcrankcasejoin.JPG (You do not have access to download this file.)
912ulsweepfromcrankcasejoin_2019-01-23.JPG (You do not have access to download this file.)
912ulstopofcrankcasedamp.jpg (You do not have access to download this file.)
