Leg interchange

[fishfool]

Hi Everyone. Will the L/U from

Hi Everyone. Will the L/U from a 1984 75 hp merc fit a 1977 85 hp engine?
Thanks glen

 

[fastjeff]

"Probably. Try doing a part n

"Probably. Try doing a part number search (driveshaft and power head to base gasket) on a site like:

http://www.crowleymarine.com/mercury_mercruiser_parts.cfm

Jeff"

 

[haventaclue]

"It had better 'cause that

"It had better 'cause that's similar to what I've done on the info given to me by a guy who does this chopping and changing for a living.As long as the shaft is the same length and the same number of splines on the top of the drive shaft and the bolts mate up,the only real difference is going to be the gear ratio which can be dealt with by prop pitch change if necessary.
There is,I believe, a difference in the number of splines on a drive shaft with a preloaded pin and the drive shaft without a preloaded pin,shaft,no pin has eight splines,if I'm wrong someone please jump on me before Glen gets a lower unit he has to put back on ebay.

"

 

[fastjeff]

"In Mercs of that age, there 1

"In Mercs of that age, there 11 spline driveshafts used with 35, 40, 50, and 60-70 hp triples, with or without the plunger. The early sixes were also 11 spline, but later ones and 65 hp to 80 hp four cylinder were all 8 spline.

Jeff"

 

[fishfool]

"Thanks for the info everyone,

"Thanks for the info everyone, I will check all these things out.

Glen"

 

[haventaclue]

"Thanks for the info Jeff.<[im

"Thanks for the info Jeff.

"