Clutch,PP question

O

outsider347

Member
I have a 59AB, and I would like to update to a 10 " clutch

Will a 8ba fly wheel,,clutch, & PP fit under the AB bell housing properly?

I have a used 8BA flywheel, & PP that I mocked up, on it now. Looks to be OK

Any in operation issues?

Tis Gents.
 
No. The 59AB and 8BA flywheels are different and do not interchange. If your 59AB flywheel is not drilled to accept a 10 inch PP you may have to re drill it for the PP? I have used a 10 inch PP on the back for several 59AB motors.
 
Krylon32 said:
No. The 59AB and 8BA flywheels are different and do not interchange. If your 59AB flywheel is not drilled to accept a 10 inch PP you may have to re drill it for the PP? I have used a 10 inch PP on the back for several 59AB motors.
Click to expand...

Does the 8ba FW. & PP interfere inside the 59 bell housing?
 
outsider347 said:
Also
OK to turn some of the weight off of the 59 FW?
TKS
Click to expand...

Most 59A that I’ve worked on have a 10” clutch and the flywheel doesn’t have the large lip around the edge. Sounds like you might have an earlier flywheel. The 8BA flywheel will fit inside the bell housing but that’s not the problem, it has a different offset.
 

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Ken/Alabama said:
Most 59A that I’ve worked on have a 10” clutch and the flywheel doesn’t have the large lip around the edge. Sounds like you might have an earlier flywheel. The 8BA flywheel will fit inside the bell housing but that’s not the problem, it has a different offset.
Click to expand...
534268
 
Check around a 46-48 flywheel isn't that difficult to find. The machine shop I use has a pile of Flathead flywheels.
 
outsider347 said:
How does that offset cause a problem?
Can the extra CI be turned of of the 59 FW

Tis
Click to expand...


The offset causes starter drive gear to ring gear distance trouble. Some starters may work...I've heard of such but can't confirm that. Otherwise the parts will fit.

Going the opposite direction, a 59AB flywheel will usually contact the rear of the 8BA block.
 
Krylon32 said:
Check around a 46-48 flywheel isn't that difficult to find. The machine shop I use has a pile of Flathead flywheels.
Click to expand...


I know that my engine is a 46-48
Could be a parts combo from the previous owners

I have a later merc block. Took me a couple days to air hammer the pistons out. This block is much, much worse condition. I did save the 4 " crank & FW (10 in clutch)
I thought that I could use this FW and get me to the 10 in clutch on my 59

The 59 FW has a large outer diameter of CI
If I use this FW, can I turn the extra CI off

Apologies about the rookie questions. I would really like to know
 
outsider347 said:
How does that offset cause a problem?
Can the extra CI be turned of of the 59 FW

Tis
Click to expand...


The offset causes starter drive gear to ring gear distance trouble. Some starters may work...I've heard of such but can't confirm that. Otherwise the parts will fit.

Going the opposite direction, a 59AB flywheel will usually contact the rear of the 8BA block.
 
The factory 59 car and light truck engines all had 10" clutches in my experience. Are you sure you don't have a pre-war flywheel with a 9" clutch?
 
38 coupe said:
The factory 59 car and light truck engines all had 10" clutches in my experience. Are you sure you don't have a pre-war flywheel with a 9" clutch?
Click to expand...

I think that you hit it .
My original clutch is 9 inches.
My FW is an early one. The PP mounting holes are blind bore holes, indicating pre war PP

Now I need a 10 in PP for 46-48 59 AB

Or I'm going to take a look at getting the PP from my 8 CM motor.

I understand that the problem is how the starter gear engages the ring gear


Anyone figured this out ???
 
I put a 46 big truck flywheel on a 49 merc, had to shave some off the back of the flywheel and make a custom starter drive to get full mesh with the ring gear that was a 11” clutch
 
outsider347 said:
I think that you hit it .
My original clutch is 9 inches.
My FW is an early one. The PP mounting holes are blind bore holes, indicating pre war PP

Now I need a 10 in PP for 46-48 59 AB

Or I'm going to take a look at getting the PP from my 8 CM motor.

I understand that the problem is how the starter gear engages the ring gear


Anyone figured this out ???
Click to expand...

Isn’t the Mercury PP the Borg and Beck style. Might make a difference.
 
Money usually solves most problems. When you don't have any money, you learn allot. "Country smarts"
 
Someone near you has to have a flywheel for a 10" pressure plate. I know I have several kicking around, but shipping from Texas to New York would be way more than the part is worth. If you have access to a lathe and a mill it is a simple job to turn off the lip and drill for the larger pressure plate bolt pattern.
Be careful with Borg&Beck style Mercury pressure plates, there are two of them and the later 52-53 doesn't work with the earlier throw out bearing.
 
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