Saito FG-21 Timing Pin?
11-06-2014, 09:17 AM
#1
Saito FG-21 Timing Pin?
Hi,
I recently had my FG-21 in for service at Horizon for a no-start condition. They tested the engine and determined that the "timing pin" needed to be replaced. I got the engine back yesterday and it runs great.
My question is, what is the "timing pin?" I looked in the parts section in the owners manual but it was not mentioned so I assume it's part of an assembly. My guess is it's what I would call the crankshaft position sensor. Does anyone know?
Thanks,
Brian
I recently had my FG-21 in for service at Horizon for a no-start condition. They tested the engine and determined that the "timing pin" needed to be replaced. I got the engine back yesterday and it runs great.
My question is, what is the "timing pin?" I looked in the parts section in the owners manual but it was not mentioned so I assume it's part of an assembly. My guess is it's what I would call the crankshaft position sensor. Does anyone know?
Thanks,
Brian
11-06-2014, 09:29 AM
#2
The prop driver hub on the FG20/FG21 is indexed or located by a threaded pin that impinges into a hole in the crankshaft.
A back fire or prop strike has sheared the original pin.
The hub on the FG20 is located in a different radial orientation than the FG21 as the ignition systems are different and work on a different principle.
The neodymium magnet is oriented at top dead center on the FG-20 and at 28 degrees BTDC on the FG21. This is relative to the casting seam on the bottom of the crankcase.
A back fire or prop strike has sheared the original pin.
The hub on the FG20 is located in a different radial orientation than the FG21 as the ignition systems are different and work on a different principle.
The neodymium magnet is oriented at top dead center on the FG-20 and at 28 degrees BTDC on the FG21. This is relative to the casting seam on the bottom of the crankcase.
11-06-2014, 10:57 AM
#3
The prop driver hub on the FG20/FG21 is indexed or located by a threaded pin that impinges into a hole in the crankshaft.
A back fire or prop strike has sheared the original pin.
The hub on the FG20 is located in a different radial orientation than the FG21 as the ignition systems are different and work on a different principle.
The neodymium magnet is oriented at top dead center on the FG-20 and at 28 degrees BTDC on the FG21. This is relative to the casting seam on the bottom of the crankcase.
A back fire or prop strike has sheared the original pin.
The hub on the FG20 is located in a different radial orientation than the FG21 as the ignition systems are different and work on a different principle.
The neodymium magnet is oriented at top dead center on the FG-20 and at 28 degrees BTDC on the FG21. This is relative to the casting seam on the bottom of the crankcase.
