heat exchanger parts 64 40hp

[hyspenc]

Hi guy's
well i was checking out some of the post's about rough engine running,and i thought that i would see how good of shape my heat exchanger was in
lot's of carbon build up inside , after getting it apart and cleaning it out i have a few quistions for the expert's i know i will be getting 2 new gaskets for the cover and inner plate but ,what do you look for to know that the heat exchanger is done and can i use the old spacer's off of the unit or should i just buy all new stuff.

still working on the old girl things are going good
Modle #RDS-26S
Sireial # C-397061

 

[F_R]

Re: heat exchanger parts 64 40hp

If it has holes in it, needless to say it's done. If it almost has holes in it (rusted/thin), it's almost done. You can re-use the spacers if they are in good condition. Don't forget the gasket washers between the spacers and inner cover plate.

 

[hyspenc]

Re: heat exchanger parts 64 40hp

Thanks F_R you have been agreat help keep up the good work
Hope to have motor back together buy end of winter , hope the old girl run's good have got the impellar changed with the new o ring's top of waterr pumpand top of drive shaft now when i get heat exchanger done just have carb and points to replace so far have about 140.00 into the old thing do you think i should stop soon or get it right? all in all she is in good shape have pic's of what i'am doing but can't shrink to fit format .
will look for ytell tales of what you said thanks

 

[tx1961whaler]

Re: heat exchanger parts 64 40hp

I just did my 1969 40 HP's outer cover a few months back. The inner cover was heavy stainless steel and had no problems. The heat exchanger itself was in good shape also. I replaced the outer cover, used the same spacers, new inner/outer cover gaskets, and there were two (new) round gaskets used to go around where the heat exchanger tubes go through. Everything was good except for the outer cover (it was ROTTEN). That and busting off quite a few of the bolts made it a funner job than it had to be......but it was a saltwater motor for quite a few years. I'd probably get the new spacers if I was doing it over again.

 

[hyspenc]

Re: heat exchanger parts 64 40hp

Thanks tax1969whaler
My heat exchanger is all still there but the threaded parts for heat tube and fresh air just spin around are they supposed to be stationary?
There are no crackes in the exchanger the material still looks ok never done one before so i couldn't tell you if it is time for a ew one

All i was trying to do is to elemanate a could be probleam there was a fare bit of carbon on the outer piston walls but have it back to the orangey brown paint.

Can the exchanger parts be bought at dealers in Canada,as i have bought some parts from Marine engine .com and the parts were priced well but the exchange and shipping and duty was a killar.
THANKS AGAIN

 

[tx1961whaler]

Re: heat exchanger parts 64 40hp

I'm pretty sure they are supposed to be stationary (sealed), or else the exhaust would get into the heat exchanger, then into the choke

 

[hyspenc]

Re: heat exchanger parts 64 40hp

Hi tx1969whaler and all
Upon closer inspection of how the part were when i took them off and how they are supposed to be acc. to manual.
the 2 gaskets that go on before spacer to seal exhaust leak were put on before the inner plate, i think that is one of the resons why i was getting alot of carbon and smoke as carb was breathing exhaust.
as to my earlier qustion on if the 2 threaded brass studs should be stationary
they are made in such a way that two sides are flat and they catch in the hole of the outer cover so you can tighten the 2 outer nuts so in my observation and i'am not sure think that the job of the two gaskets before the spacers make it air tight.
If any one Knows for shure please let me know
And thank's again tx for your help greatly appreciated.

 

[tx1961whaler]

Re: heat exchanger parts 64 40hp

Sounds like you got it right. I don't actually use the heat exchanger or automatic choke, but it's still in there. Mine is just plugged off outside, where the air tube used to go. I manually choke it.

 

[hyspenc]

Re: heat exchanger parts 64 40hp

Thank's again for your help
I'll go ahead and put it back together the way it was built
and see if i have a better time of it.
i will let you know in about 3 month's
don't know if i am wasting my time with the old thing
but ha you never know.
Got a few more thing's to do to it and then i will be ready for spring.
Thank's again

 

[tx1961whaler]

Re: heat exchanger parts 64 40hp

Good luck!
When I get to thinking I'm wasting my time on my old motors, I just go out and price new ones. That usually sets me straight. Plus mine sits out in my driveway, and I don't worry too much about somebody stealing my old beat up looking stuff.