Wet sleeve has the advantage of the shortest path for heat transfer from the cylinder to the liquid coolant. The down side is with the coolant in direct contact with the outside of the sleeve, you have the potential for coolant leaks at the seals where the sleeve/block/head meet, plus the chance of cavitation damage to the wet sleeve.
Dry sleeve has a longer path for heat transfer from dry sleeve to block to coolant, also takes precise fit of the block and sleeve exterior to get good sleeve to block contact for good heat transfer. The up side is that the potential for coolant leaks is much less than a wet sleeve.
Dry clutch is simple to build and up to the job in most cases.
Wet clutch has the advantage of running in oil to lubricate and cool it in severe use, so they are long lived under heavy use.
The down side is that a wet clutch makes it much more complicated to seal the clutch oil from leaking into the starter,engine and transmission, or leaking out of the clutch housing.
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Today's Featured Article - Memories of an IH Super A When I was ? up to 10, I worked on my Papaw's farm in Greeneville, TN every summer. As I grew older (7), it was the thrill of my day to ride or drive on the tractor. My Papaw had a 1954 IH Super A that he bought to replace a Cub. My Papaw raised "baccer" (tobacco) and corn with the Super A, but the fondest memory was of the sawmill. He owned a small sawmill for sawing "baccer" sticks. The Super A was the powerplant. When I was old enough (7 or 8), I would get up early and be dressed to
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