@Bruce_Butterfield @LeonL I feel so lucky today, I avoided the perfect storm.
@UWStoutSkier Very interested in learning what caused your failure.
I am super careful and I usually very anal at checking where the oil filter ring is when I take off the filter. Years ago my ski partner missed the double gasket a filter on his Toyota truck. He got 1/2 block before the oil dumped onto the street.
Anyway, back to the story. I usually drain my boats oil when it is on the trailer. Put the oil drain hose through the water plug drain and let it drain overnight. In the morning when everything is cool replace the filter and add oil.
This year we have the boat on a lift and we hit the 50 hour mark. Time for an oil change. We finish our sets, put boat on lift and pump out the oil using a vacuum pump. So far everything is great. I decide to tackle the filter when it is hot. Get the zip lock bag and unscrew the filter, play hot potato, drop into zip lock bag, and seal. Screw the new filter in and make it tight. Add 4.5 qts of oil. I was done, it was time to get out from under the boat canopy where it is ~100 degrees.
On my way home from the lake, I drop off the oil and filter at a oil recycle station. Evidence is now gone. end of story.... not yet....
Yesterday, was the first day after oil change. I start boat and everything is dry in the engine compartment. We ski 8 sets, and the boat goes back onto the lift. Open engine cover to pull drain plug and there is a sheen of oil in the bilge. There is evidence of oil escaping from the filter with oil spray on the inside of the engine cover. Yesterday it was hot and humid, and I decided to deal with the problem this morning while everything was cool.
This morning, I started to troubleshoot the problem.
1. ) Check dipstick for oil. Dipstick had oil and showed that I was just 1 qt LOW. Whew!
2. ) Next figure out what is wrong with filter.
3. ) The filter was loose, and could be tightened 1.5 turns. I loosened the filter and could see a second rubber gasket in addition to the one stuck on the filter.
4. ) I removed the second gasket, reattached the filter, and added 1.5 qts of oil.
5. ) Run engine until everything is hot.... No leaks.
With the filter that loose, I was probably 1-2 sets from a catastrophic engine failure.
Lessons learned.
1. ) Always deal with the filter when it is cool enough to handle.
2. ) Double and triple check that the old filter gasket came off with the filter.
3. ) Wait a couple of days before recycling the filters and oil.
4. ) Check for that oil filter gasket one more time.