flatyre

<p>Oh dear, if life was that simple. A clam engine is a type of engine found on a lot of homeowner saws, On a tyical pro saw, the lower crankcases form the lower part of the engine, are split vertically (the crank sits in the two crankcase halves) and the cylinder bolts down on to the crankcases making them relatively easy to work on.</p>

<p>On a clam engine, the engine sits in a plastic cradle that holds the metal engine, it splits horizontaly, the lower cylinder forms the top part of the crankcase and the lower crankcase is like a clam shell which clamps the crankshaft between the cylinder bottom and the lower clam.</p>

<p>This effectively means that the saw needs to be completely stripped down to get the cylinder off, including, carb, flywheel, clutch, oil pump etc etc and on the 029/039, the rear handle, covers and top handle need removing.</p>