Originally Posted by
acdii
Instructions for the FG-11 include cleaning the muffler to get rid of the coking or other buildup and is a recommended maintenance. I think the only thing that would be needed to convert the FG to a CDI Glow would be to change the carb. With that said, why not get the ignition from Saito? The collet has a magnet in it and a set screw to secure it to the shaft, add that and the hall effect and you have pretty much the FG with a glow carb.
The medium block FG-21 & smaller Saito gas engines can easily be converted to CDI/methanol by swapping out the carburetor & perhaps the manifold. Not so simple on the big block FG-30 & larger. They use an entirely different manifold/cylinder head interface.
The magnet in the prop hub approach only works when there is a pin or key in the crank to locate the prop hub in precise orientation & secure it from inadvertent slippage.
The Saito FG series engines have a pin in the crank & a notch in the hub. A small adjustment is provided in the Hall sensor mount.
Even if you were able to get the prop hub in the proper position, W/O the pin, it has a tendency to shift on initial start up. If you allowed fir some slippage by setting it up W/ample adjustment for advance in the hall sensor mount you would probably be OK. After prop hub R&R & the possible initial start up shift, the prop hub stays secure in the setting.
BUT, this begs the question why bother when you would have as much as the CH -Ignitions system costs in the Saito parts anyway? Also, W/the Saito system you will have to figure out a way to secure the hall sensor mount to the case. Drill a& tap the case perhaps?
The cam housing hall sensor mount & set screw secured trigger magnet ring for the prop hub used in the CH-Ignitions conversions eliminates any mounting issues.