Looking for flywheel suggestion

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Is your mag side shaft roughly 5/8 inch? On our marine engine we manufactured we used Zen G62 mags and locked the 5/16 inch bolt down to hold the flywheel to the taper with no keyway. Made it nice because we could adjust timing without having to cut new keyways all the time. Never did we have one come loose or spin. You have a lot of surface area and the bolt was torqued to 20 foot pounds of torque.
 
TODD said:
Is your mag side shaft roughly 5/8 inch? On our marine engine we manufactured we used Zen G62 mags and locked the 5/16 inch bolt down to hold the flywheel to the taper with no keyway. Made it nice because we could adjust timing without having to cut new keyways all the time. Never did we have one come loose or spin. You have a lot of surface area and the bolt was torqued to 20 foot pounds of torque.
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5/8 diameter or 5/8 length?
 
Sorry diameter. G62 flywheel and the normal marine style flywheels are same outside diameter and thicknes just different bore tapers on them.
 
I am probably going into the shop later today. If I remember when I am there I will measure our shafts we used to make.
 
Our main shafts we used to make to use Zenoah G62 flywheels was:

15.82mm starting tapering down to 12.2mm over a 18.9 length
 
TODD said:
Our main shafts we used to make to use Zenoah G62 flywheels was:

15.82mm starting tapering down to 12.2mm over a 18.9 length
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Ok yeah so that wouldnt work. Too thick and tapers down too big. I'm currently trying to get measurements of that other flywheel fir that dynamite .31 gas engine but nobody likes to get back to me with actual measurements
 
There might be another way to do it too. Take a flywheel and bore a straight hole through it. Than make a hat to go in from back side with your taper in it to match the crankshaft taper you have. Slot the holes in the hat and use flat head screws to hold it to the threaded holes in the flywheel. Than you can loosen the flat head screws and set timing. Kind of similar to what was used to put water cooled flywheels on the aircooled Zen engines in the boats. They also had a key in the hat that was close to start with. It just depends how trick you want to get and how much you want to complicate things.
 
TODD said:
There might be another way to do it too. Take a flywheel and bore a straight hole through it. Than make a hat to go in from back side with your taper in it to match the crankshaft taper you have. Slot the holes in the hat and use flat head screws to hold it to the threaded holes in the flywheel. Than you can loosen the flat head screws and set timing. Kind of similar to what was used to put water cooled flywheels on the aircooled Zen engines in the boats. They also had a key in the hat that was close to start with. It just depends how trick you want to get and how much you want to complicate things.
Click to expand...
I'd preferably want the flywheel fixed for simplicity and i don't need a timing adjustment on the flywheel itself because I've already got a adjustable hall sensor mount disgned up. But great idea ?
 
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