Here's a fun one for you. I recently changed the oil in my Kohler CV22S and replaced the oil filter. I put in a FRAM brand oil filter.
This is an older motor, not sure of the vintage (see my post about the SAM, still looking for one).
I had previously treated the old crankcase oil with SeaFoam. Ran the motor for about six hours, then I changed the oil and replaced the filter.
Because it's an older motor, I thought I'd treat the new oil with Restore in case the old carbon deposits were actually sealing up some of the worn areas inside the cylinders or something. I added new oil according to the manual and weighed it in order to get the volume right. I replaced about 7% of the new oil with Restore. I should have looked up the recommended dosage but the bottle didn't have any information so I just went with a reasonable number.
I mowed for about an hour: the first mowing session was about a half an hour, and then I stopped it and let it sit for a few days, then re-checked the oil level and mowed again. About a half an hour in I heard the engine start knocking, and I saw to my amazement a huge puddle of oil all over the deck, sliming up my belts. I took it back in my shop and re-tightened the filter because I couldn't figure out where the oil leak could possibly be. I refilled the oil (about a quart). Started it up and watched in horror as my new oil gushed out of a bullet-sized hole in the end of the brand new filter. It looked like a bullet had been ejected from inside the filter.
Any ideas what happened?? I'm about to try again with a new Kohler filter. I'm going to skip the Restore this time. All I can think of is that a big chunk of carbon got loosened up. Either that or a piece of shrapnel.
This is an older motor, not sure of the vintage (see my post about the SAM, still looking for one).
I had previously treated the old crankcase oil with SeaFoam. Ran the motor for about six hours, then I changed the oil and replaced the filter.
Because it's an older motor, I thought I'd treat the new oil with Restore in case the old carbon deposits were actually sealing up some of the worn areas inside the cylinders or something. I added new oil according to the manual and weighed it in order to get the volume right. I replaced about 7% of the new oil with Restore. I should have looked up the recommended dosage but the bottle didn't have any information so I just went with a reasonable number.
I mowed for about an hour: the first mowing session was about a half an hour, and then I stopped it and let it sit for a few days, then re-checked the oil level and mowed again. About a half an hour in I heard the engine start knocking, and I saw to my amazement a huge puddle of oil all over the deck, sliming up my belts. I took it back in my shop and re-tightened the filter because I couldn't figure out where the oil leak could possibly be. I refilled the oil (about a quart). Started it up and watched in horror as my new oil gushed out of a bullet-sized hole in the end of the brand new filter. It looked like a bullet had been ejected from inside the filter.
Any ideas what happened?? I'm about to try again with a new Kohler filter. I'm going to skip the Restore this time. All I can think of is that a big chunk of carbon got loosened up. Either that or a piece of shrapnel.