Reply To: Rebuilt Engine Longevity

[Dave White]

The Series 36 also has a bypass oil filter that operates as Greg described above. It is the silver canister in the upper left of the photo. The element is replaceable with a farm equipment filter. I can dig up the part number if anybody needs it.

A good air filter is the bigger challenge on the Series 33/36 engines. There are two air intakes on the carb, one a round screen and one that comes into the side of the carb through the block from the right side of the engine below the exhaust manifold( the polished piece behind the water pump outlet pipe is the intake). Just to make it more challenging, there is also a water pipe that goes through the same opening (the valve visible below the air intake) plus some small holes for the water line on the carb side of it. As Paul Johnson referenced above, there also appears to be an opening inside the passage through the block that pulls crankcase air into the intake. So there are a lot of sources for air.

I have been trying to come up with something to filter the incoming air. The round screen could be wrapped, but coming up with something for the block intake is a little more challenging. I have thought about something very thin to go between the carb and the block, but it wouldn’t have much surface area and having to pull the carb loose every time I wanted to clean it would be a pain. If anybody has come up with a good air filter solution for the later dual valve 6’s, please post it. Dave