I am fairly new to the forum. As owner of a few old Rupps, I am seeking some information on a couple of items.
1. In my old Tecumseh manual the specs say the valve seat angle on the hs40 is 45 degrees. However, a diagram on different page shows a 46 degree seat angle. Which is the correct angle?
2. On one of the motors, the camshaft has a fair amount of end to end play. I think this is the internal noise I was hearing when the engine was running. Being a Black Widow motor, the governor was disabled but the internals were intact. However the governor sprocket was missing some teeth, I assume due to the amount of camshaft endplay. Would it be advisable to try and shim one end of the camshaft or maybe build up one of camshaft sockets in either the block or side case to eliminate the movement? Would JB weld be an appropriate filler? I tried another camshaft but still have the end play. Any suggestions appreciated.
1. In my old Tecumseh manual the specs say the valve seat angle on the hs40 is 45 degrees. However, a diagram on different page shows a 46 degree seat angle. Which is the correct angle?
2. On one of the motors, the camshaft has a fair amount of end to end play. I think this is the internal noise I was hearing when the engine was running. Being a Black Widow motor, the governor was disabled but the internals were intact. However the governor sprocket was missing some teeth, I assume due to the amount of camshaft endplay. Would it be advisable to try and shim one end of the camshaft or maybe build up one of camshaft sockets in either the block or side case to eliminate the movement? Would JB weld be an appropriate filler? I tried another camshaft but still have the end play. Any suggestions appreciated.
Last edited: