Roll pin

[Geoffrey Graydon]

One for Racer here. I have just replaced the impeller on a 77 6hp Johnson and I'm wondering what the roll pin is for at the upper end of the drive shaft. It says on the diagram it's for 5 inches longer models which would be for a long shaft,which this one isn't. Any of your wisdom appreciated.

 

[Crosbyman]

roll pin holds the brass cup in place which retains the spring which retains the carbon seal etc.....

 

[racerone]

The roll pin drives / turns the mechanical seal.----And it is used for both long and short shaft.-----I say remove the power head and replace #1 and #3-----Inspect #4-----Refinish #2.

 

[geoffwga1]

Thank you both.I had an idea that's what it was.One other question ,how comeif it holds that assembly up wheywry did it not come down when I withdrew the shaft,does it have a tendency to stick up there?

 

[racerone]

The pin comes through a slot in the housing.-----Those parts stay up there.----On a 50 year old motor it makes perfect sense ( to me ) to remove the power head to inspect those parts.

 

[Crosbyman]

the procedure to drop the GC on older CD will show you the area of concern. not a big deal to lift the PH but if you damage the base gasket a new one ...and the correct one will be needed ( patterns differ!!)