Challenger 787 rebuild question

[PASTFAST03]

Hello today i took one of the motors out of my challenger 1999 1800 with a band bottom end. I purchased a used 787 motor locally with good compression but decided when i got home to tear the motor down still to do gaskets and inspect the inside to make sure 100%. I flushed the motor down and cleaned it with brake cleaner.

About the reinstall motor should i pour sw30 motor oil in the bottom end and how much before i install?

Anything eles i should do before i install?

Since it is a stock motor do i have to align the shaft again?

 

[Seadoobuddy]

You should align the drive shaft again.

I believe that Dr. Honda only uses a little bit of oil on the crank & pistons after rebuilding....wait for a better answer before using SW30 oil...

How old is the newer motor? Compression while cold and with WOT???....no oil added to it???

 

[PASTFAST03]

I purchased the motor out of a ugly ski the guy didnt want no more we ran the motor and compression tested it was good.

What is the easiest way to align the drive shaft?

 

[LouDoo]

NO oil goes in the crankcase, there is a cavity for the counterbalance shaft the gets a couple of ozs. of synthetic injector oil. You will need to rent, borrow or buy an alignment tool.

http://www.shopsbt.com/jetski/80-103B.html

Lou

 

[Dr Honda]

Yep... what they said.


I put a little 2-stroke oil in the lower half to make sure there is oil on start up... but only a little.

Also... as Lou said... you need to make sure there is oil in the counter balance. Depending on the case design you will need 1 oz XPS synthetic, or 30wt.

 

[jhjesse]

NO oil goes in the crankcase, there is a cavity for the counterbalance shaft the gets a couple of ozs. of synthetic injector oil. You will need to rent, borrow or buy an alignment tool.

http://www.shopsbt.com/jetski/80-103B.html

Lou

Lou,
I think the oil that needs to be added to the counterbalance cavity is SAE 30wt. oil. (30mL or 1oz.)