My marina has indidcated that the crankshaft dampener is going on my
1969 in-line 6 mercruiser.

Can someone give me an idea what it does and where I can find the
part for my old engine. It's a 200 HP (same block as the in line
165HP).

Thank-you

BTW the Mercruiser # for your part is 39973 and is listed as no longer
available.

"

Hi Tom,

I believe that it is some kind of automobile engine that has been converted
to a marine application.

If so, you might be able to buy on at an auto parts store if you can
identify it.

It should be a Ford, GM or Chrysler product?

--
Bill Kiene

Kiene's Fly Shop
Sacramento, CA
www.kiene.com

"tom clark" wrote in message
m...

My marina has indidcated that the crankshaft dampener is going on my
1969 in-line 6 mercruiser.

Can someone give me an idea what it does and where I can find the
part for my old engine. It's a 200 HP (same block as the in line
165HP).

Thank-you

Tom- If it's the same as the 165hp mercruiser then it's a chevy/GM 250
cubic inch inline or straight six, very popular in the seventies, but
I've never heard of a 200hp version, I think the 200hp would be the
292cu. in. chevy/GMC I'm not sure if the balancer would be the same, but
you could check in the local auto parts. The 292 came in chevy/GMC vans
from 75' thru 78', probably came in trucks too. Good Luck. Tom.

I think that Chevy had the195ci (Nova), 235ci (real standard), the 250ci
(only one with counter balances on the crank) and the 292ci straight six
motors in those days.

If you can identify it, you can use a part from the auto industry as long as
the belt pulley to drive "stuff " (generator/alternator, water pump) is the
same?

--
Bill Kiene
(old hot rodder)

Kiene's Fly Shop
Sacramento, CA
www.kiene.com

wrote in message
...

Tom- If it's the same as the 165hp mercruiser then it's a chevy/GM 250
cubic inch inline or straight six, very popular in the seventies, but
I've never heard of a 200hp version, I think the 200hp would be the
292cu. in. chevy/GMC I'm not sure if the balancer would be the same, but
you could check in the local auto parts. The 292 came in chevy/GMC vans
from 75' thru 78', probably came in trucks too. Good Luck. Tom.

tom clark wrote:

"Bill Kiene" wrote in message y.com...
I think that Chevy had the195ci (Nova), 235ci (real standard), the 250ci
(only one with counter balances on the crank) and the 292ci straight six
motors in those days.

If you can identify it, you can use a part from the auto industry as long as
the belt pulley to drive "stuff " (generator/alternator, water pump) is the
same?

Thank-you for all the good info. Yes it is the 292 chevy block.The 200
hp mercruiser was only sold for a couple of years 1969 -1972.

The marine owner says I need a crankshaft dampener for two pully's but
why would that change the internal make-up of the dampener? Is it
because I have a sea pump and an alternator and therefore need two
pullys on one dampener?

Tom be careful about this, GM had a propensity to externally balance their engines when they increased the
capacity by just stroking them (is the 292 just a stroked 250?? or did they bore it?? longer stroke, bigger
crankshaft throws, oops run out of room & camshaft clearance for internal balance weights, so put weights on the
flywheel/balancer/damper). Before you let anyone go putting just any balancer from that series of blocks on, you
should make enquiries of an engine rebuilding shop or even a knowledgeable GM repairer to ensure the balancer you
fit is indeed correct for that capacity of GM 6 cyl & it's particular flywheel, crankshaft & balancer setup.


K

--
Bill Kiene
(old hot rodder)

Kiene's Fly Shop
Sacramento, CA
www.kiene.com

wrote in message
...

Tom- If it's the same as the 165hp mercruiser then it's a chevy/GM 250
cubic inch inline or straight six, very popular in the seventies, but
I've never heard of a 200hp version, I think the 200hp would be the
292cu. in. chevy/GMC I'm not sure if the balancer would be the same, but
you could check in the local auto parts. The 292 came in chevy/GMC vans
from 75' thru 78', probably came in trucks too. Good Luck. Tom.

Thanks will do.

It looks like it is going to take me some time to find the part so
can anyone give me an idea as to how long I have to run the boat?

I don't feel much play in the crank pully when not running.

What will happen? Will the crankshaft pully/dampener fall off?
Crankshaft break?

Thanks






"K. Smith" wrote in message ...
tom clark wrote:

"Bill Kiene" wrote in message y.com...
I think that Chevy had the195ci (Nova), 235ci (real standard), the 250ci
(only one with counter balances on the crank) and the 292ci straight six
motors in those days.

If you can identify it, you can use a part from the auto industry as long as
the belt pulley to drive "stuff " (generator/alternator, water pump) is the
same?

Thank-you for all the good info. Yes it is the 292 chevy block.The 200
hp mercruiser was only sold for a couple of years 1969 -1972.

The marine owner says I need a crankshaft dampener for two pully's but
why would that change the internal make-up of the dampener? Is it
because I have a sea pump and an alternator and therefore need two
pullys on one dampener?

Tom be careful about this, GM had a propensity to externally balance their engines when they increased the
capacity by just stroking them (is the 292 just a stroked 250?? or did they bore it?? longer stroke, bigger
crankshaft throws, oops run out of room & camshaft clearance for internal balance weights, so put weights on the
flywheel/balancer/damper). Before you let anyone go putting just any balancer from that series of blocks on, you
should make enquiries of an engine rebuilding shop or even a knowledgeable GM repairer to ensure the balancer you
fit is indeed correct for that capacity of GM 6 cyl & it's particular flywheel, crankshaft & balancer setup.


K

--
Bill Kiene
(old hot rodder)

Kiene's Fly Shop
Sacramento, CA
www.kiene.com

wrote in message
...

Tom- If it's the same as the 165hp mercruiser then it's a chevy/GM 250
cubic inch inline or straight six, very popular in the seventies, but
I've never heard of a 200hp version, I think the 200hp would be the
292cu. in. chevy/GMC I'm not sure if the balancer would be the same, but
you could check in the local auto parts. The 292 came in chevy/GMC vans
from 75' thru 78', probably came in trucks too. Good Luck. Tom.