Ring gear placement

[crabandy]

I just want to verify before I safety the prop and spacer on that I've got the ringgear support on correctly.

My finger is pointing to the lug on the crank that has a shoulder on it that is .03 larger diameter. The 0 hole on the flywheel support goes on this oversized lug.
180 degrees to the shoulder lug is a shorter lug that is flush with the ringgear support.

[Russ McCutcheon]

Originally Posted by crabandy

I just want to verify before I safety the prop and spacer on that I've got the ringgear support on correctly.

My finger is pointing to the lug on the crank that has a shoulder on it that is .03 larger diameter. The 0 hole on the flywheel support goes on this oversized lug.
180 degrees to the shoulder lug is a shorter lug that is flush with the ringgear support.

It will only go on in one position, you can't screw it up.

[crabandy]

Thanks, thats what I thought but I did buy the ring gear separate from the engine and wanted to make sure.

[BSwayze]

Not to hijack this thread or anything, his question seems to have been answered. But while we're on the subject of ring gears, I have two questions for the more knowledgeable folks here.

My engine came with a flywheel that has a smaller diameter pulley for the alternator belt. I've never seen one of these on an RV. Every example I've seen is the larger diameter. This will obviously turn the alternator at a slower RPM than the larger diameter one. Is there a problem with this? Should I consider replacing it? Or am I good to go with this one?



My next question has to do with the lugs on the crankshaft hub. My engine is an O-360-A4A. The A4A has longer lugs, and as you can see in this picture, they stick out through the flywheel farther than the ones in the pictures above from crabandy. Is this a problem? I'm wondering if the lugs might need to be replaced.



Thanks in advance for any comments!

[Mike S]

Think about this----------the ignition timing marks are on the flywheel.

[Russ McCutcheon]

Hi Bruce,

I can?t answer about the alternator pulley but your thread inserts look the same as mine, work fine with my MT CS prop, I don?t know how they might work with other setups.

[Russ McCutcheon]

Originally Posted by Mike S

Think about this----------the ignition timing marks are on the flywheel.

Ya and that's probably why they made it so it would only go on in one position.

[Mike S]

Originally Posted by Russ McCutcheon

Ya and that's probably why they made it so it would only go on in one position.

Well done, Padawan

[Russ McCutcheon]

Originally Posted by Mike S

Well done, Padawan

Good one, I had to look it up

[Auburntsts]

Originally Posted by BSwayze

Not to hijack this thread or anything, his question seems to have been answered. But while we're on the subject of ring gears, I have two questions for the more knowledgeable folks here.

My engine came with a flywheel that has a smaller diameter pulley for the alternator belt. I've never seen one of these on an RV. Every example I've seen is the larger diameter. This will obviously turn the alternator at a slower RPM than the larger diameter one. Is there a problem with this? Should I consider replacing it? Or am I good to go with this one?



My next question has to do with the lugs on the crankshaft hub. My engine is an O-360-A4A. The A4A has longer lugs, and as you can see in this picture, they stick out through the flywheel farther than the ones in the pictures above from crabandy. Is this a problem? I'm wondering if the lugs might need to be replaced.



Thanks in advance for any comments!

The important thing is that your prop hub matches your flange configuration. The manual that came with my Hartzell prop detailed the acceptable hub-flange combinations.