Hey folks,
I have a P35 with the A4 and it's beginning to show it's age a little. I've given a lot of thought to re-powering with the Beta 28 but the price tag is around 9K with me doing all the work.
As I begin to run the prop calculators, I'm finding out an A4 with a 2:1 gear reduction puts out about the same HP and close to the same torque as the Beta 28. Rebuilding the A4 and adding a 2:1 gear reduction (doing the work mostly myself) is about 1/3 the cost of the Beta 28 option.
The questions I have are:
1. Will the 2:1 reduction unit fit the P35's limited engine compartment without reworking cabinets (IE needing to slide the engine forward because of the added six inches from the reduction unit), or can I use the existing A4 mounting holes and shorten the prop shaft? Note, this is why I gave up on the Universal M35B (Gallery Marine is running a special on them for $7387).
2. I have the 7/8 prop shaft and the A4 diagrams specify reduction units using 1 or 1 1/8 bore/key ways. Do I need a new shaft log, just a "thinner" cutlass bearing, or adapt the bore / key way and keep the 7/8 shaft? After all it maybe six inches shorter!
3. Finally, from all you 2:1 folks out there, is the upgrade to the 2:1 reduction gear really worth it?
Thanks,
Jeff
I have a P35 with the A4 and it's beginning to show it's age a little. I've given a lot of thought to re-powering with the Beta 28 but the price tag is around 9K with me doing all the work.
As I begin to run the prop calculators, I'm finding out an A4 with a 2:1 gear reduction puts out about the same HP and close to the same torque as the Beta 28. Rebuilding the A4 and adding a 2:1 gear reduction (doing the work mostly myself) is about 1/3 the cost of the Beta 28 option.
The questions I have are:
1. Will the 2:1 reduction unit fit the P35's limited engine compartment without reworking cabinets (IE needing to slide the engine forward because of the added six inches from the reduction unit), or can I use the existing A4 mounting holes and shorten the prop shaft? Note, this is why I gave up on the Universal M35B (Gallery Marine is running a special on them for $7387).
2. I have the 7/8 prop shaft and the A4 diagrams specify reduction units using 1 or 1 1/8 bore/key ways. Do I need a new shaft log, just a "thinner" cutlass bearing, or adapt the bore / key way and keep the 7/8 shaft? After all it maybe six inches shorter!
3. Finally, from all you 2:1 folks out there, is the upgrade to the 2:1 reduction gear really worth it?
Thanks,
Jeff
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