How to swap drive shaft, 'rude 6HP 1970

[rifleman_maynard]

I am trying to change a short shaft (model 6002B) to a long shaft. All has gone smoothly until I tried to swap the drive shafts.

I removed the impeller housing to bearing housing stack. Looking down the drive shaft into the gear case and comparing it to the assy diagram on the BRP site it looks as if I need to disassy the gear case. Is this correct? Or am I missing something?

I have removed the 6 phillips screws that hold the gear case together and the pivot pin. A little light bashing with a hammer has not budged the bottom of the gear case.

Where and how do I bash this (if I need to) to get it apart?

Also, does anyone have a source for a manual for this motor? I have searched a bit but have not turned one up.

Thanks!
Doug

 

[F_R]

Re: How to swap drive shaft, 'rude 6HP 1970

Put the screws back in. You don't have to take that apart. Are your two drive shafts different on the lower end? There was a design change at one point, not sure just when. I don't think they are interchangeable though. Early motors had a shock absorber shaft below the water pump, which was done away with in later motors. You can get the shock absorber out by removing the bearing plate under the water pump. But as I said, they wont interchange because the pinion bearing is different. At least that is the way I remember it.

 

[rifleman_maynard]

Re: How to swap drive shaft, 'rude 6HP 1970

I can't tell for sure if the lower ends of the two drive shafts match because I have not got the short one out yet. The long one matches the BRP parts diagram at:

http://epc.brp.com/default.aspx?brands=ej&lang=E

pick evinrude, 1970, 6HP, 6002, gearcase group.

I don't see any sign of a shock absorber shaft of any kind. The assy diagram shows a pinion key and a drive shaft to pinion retainer (looks like a half moon clip) at the bottom of the shaft. That matches the long (new) shaft which has a key slot and a groove for a retainer clip at the bottom. The shaft will not pull up out of the gear case. There is a _small_ amount of end play when I tug on the shaft.

When I look down into the cavity under the bearing plate, the drive shaft disappears into what might be some kind of bearing housing. The housing (if that is what it is) has a radial slot on each side of the drive shaft that might accept a special tool of some kind which engaged the slots and let you unscrew the housing. I am guessing here because I have never disassyed one of these.

I guess I better look harder for a shop manual.

Thanks.

Does the gear case need to be in gear? Like forward or reverse? I currently have it in neutral.