Surfriding Low Profile Bearing Carrier?

[scottie mac]

With all these aftermarket hulls out there, has anyone developed a low profile (thinner) bearing carrier for a Yamaha? Or, has anyone converted a set back Yamaha mag pump to a Kawi style pump? Meaning, put the small pump shaft in the Yamaha pump and used a Kawi prop and driveshaft in a Yamaha ski?

The reason I ask is, we are working on a project ski and with the stock Yamaha bearing carrier, we can't get the motor back far enough. We would like to gain about an inch of rearward spacing. Any ideas?

Scottie

 

[DangerBoy]

An FX-1 short shaft is 16mm shorter than the superjet and you can push it 2-3 mm further back, that will get you 3/4 of an inch

Db

 

[Waternut]

I put a GP760 midshaft in my stunt hull to move the engine back. I got 1" back from that midshaft over the stock SJ one so you may want to look into that. The FX-1 midshaft is 5/8" shorter than stock I believe. So there are two options for you. Both will mount up normally and accept the stock SJ pump and driveshaft.

 

[special fx]

Also check out Kawi couplers, that could set you back another 1" to 1 1/2".

 

[OCD Solutions]

I have another GP760 midshaft here if you need any dimensions.

 

[ryan]

i think he is talking about the size of the bearing housing not the shaft. it is kind of big.

 

[chriselmore_1]

what about a square nose bearing housing?

 

[Matt_E]

What about it?
There are two different styles for the Squarenose.
The 90-93 has a smaller foot print and will only bolt up to 90-93 hulls.
I don't think the profile is any lower.

 

[SXIPro]

What about it?
There are two different styles for the Squarenose.
The 90-93 has a smaller foot print and will only bolt up to 90-93 hulls.
I don't think the profile is any lower.[/QUOTE]

Me neither.

 

[SuperJETT]

There is plenty of room behind the bulkhead, so it could be moved back by relocating that.

 

[Waternut]

i think he is talking about the size of the bearing housing not the shaft. it is kind of big.

I assumed that at first too but he said he wanted to move the engine back and just shrinking the housing doesn't do that so I figured he had to be talking about the shaft.

Some clarification may be needed.

 

[ryan]

it would give the room to make the shaft even shorter.

 

[scottie mac]

What we are doing is putting a Kawi 1100 motor in a carbon fiber blaster hull. With the stock carrier, even with kawi couplers, we can't get the motor back as far as we want, no matter how far rearward you push the shaft. So, what I was wondering was, is there a thinner option as far as the bearing housing itself?

Thanks for the help,
Scottie