I think he's referring to the hole drilled in the side of crankshaft;
the hole that allows the pressurized oil to enter the front hollow part
of the crankshaft.

I had an RV-6 with a Lycoming E2A engine and had planned to convert it
to constant speed. Assembled all the needed parts, governor, prop, nose
cone, etc and then pulled the old wood prop from my engine. Imagine my
delight when I discovered that the previous owner of the engine had
replaced the original crankshaft (which would have had the hole in the
side of the crankshaft) with a crankshaft that did NOT have the hole and
crossover tube.

John

Cy Galley wrote:
They are already drilled! Need to remove front plug and insert rear plug in
the front of the crank. Can be done without disassembling the engine.


"Scott" wrote in message
...

Does he need a constant speed prop on the airboat???



Ole Moyer wrote:

Drilling a solid crankshaft



Has anyone had experience with a solid Lycoming crankshaft modified
(drilled) to open oil passages required to control a constant speed prop?



I'm asking for a cousin with a friend who knows a guy with an airboat.