155mm oem pump bearings

M

mrjdm

Location
chicago
Putting a oem setback 155mm pump into my kv997 reaper. I have read somewhere in the past that 2 different bearings are used, 1 for the front, 1 for the rear but cant find that information again.

Does anybody know what bearings I need to buy?
 
Sasquachcrap

Sasquachcrap

Location
North Carolina
It is correct that Yamaha uses a certain bearing setup in the 155 pumps but... in all cases no matter 144 or 155 stator the shaft used determines the bearings needed. As to which one you need, which shaft do you have?
 
M

mrjdm

Location
chicago
Sasquachcrap said:
It is correct that Yamaha uses a certain bearing setup in the 155 pumps but... in all cases no matter 144 or 155 stator the shaft used determines the bearings needed. As to which one you need, which shaft do you have?
Click to expand...

My Krash came with a 148mm setback. Going to use the Krash driveshaft but I havent taken everything apart yet. Im new to this and am under the impression that setback means the prop is cutback? Going to get a 5mm cutback prop from Impros probably. Maybe I am using the wrong language?
 
Sasquachcrap

Sasquachcrap

Location
North Carolina
mrjdm said:
My Krash came with a 148mm setback. Going to use the Krash driveshaft but I havent taken everything apart yet. Im new to this and am under the impression that setback means the prop is cutback? Going to get a 5mm cutback prop from Impros probably. Maybe I am using the wrong language?
Click to expand...

Let me save you some headache. The setback shaft won’t work in an oem pump. I can cut you any shaft length you need and get your 155 pump set up. May I ask why your going away from the Krash setback?
 
M

mrjdm

Location
chicago
Sasquachcrap said:
Let me save you some headache. The setback shaft won’t work in an oem pump. I can cut you any shaft length you need and get your 155 pump set up. May I ask why your going away from the Krash setback?
Click to expand...

Not so much getting away from Krash pump as much as that i want to try a oem 155mm. What reason wouldnt the Krash shaft work? I was told it should but again i havent taken anything apart yet
 
Sasquachcrap

Sasquachcrap

Location
North Carolina
mrjdm said:
Not so much getting away from Krash pump as much as that i want to try a oem 155mm. What reason wouldnt the Krash shaft work? I was told it should but again i havent taken anything apart yet
Click to expand...

I would have to see it but I have cut a couple krash setbacks and I know the bearing spacing is different then the oem. Also the length will be different. The bearing location and length is what makes it a setback. (Not the prop) Here is a picture of the bearing surface differences.
8363f69c9350a13c4535188006d69c98.jpg



Both are for a Superjet application.
 
M

mrjdm

Location
chicago
Interesting. The 155mm pump ihave came with an oem driveshaft, what is easier? for me to send you that? and what would it cost?
 
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