Ring Gear 1995 Mercruiser 5.0 LX

Joined
Jun 24, 2019
Messages
27
I am looking at replacing the ring gear on the 5.0 LX. I checked the parts catalogue online, but the only listing is for the whole flywheel with the ring gear already installed. When I do an onlibe search, Sierra has a ring gear listed for a 14-1/8 flywheel, PN: 18-4516. Would anyone know if this is the correct part number or the correct size? I am away at work now and not close to the boat, so measuring is not an option.
Thanks
Clyde
 
Joined
Jun 24, 2019
Messages
27
Thanks Kenny. I was hoping to order it online and have it by the time I got home. Looked on the NAPA site but like I said, not sure of the part number or the measurements on the flywheel.
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,411
only two depends on how many teeth if the starter bolts are staggared its a 168 straight across 153
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
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Jul 23, 2011
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50,796
there are only 2 sizes of chevy ring gears......in a boat (or any rear-wheel drive car from 1955 to present)

the 153 tooth or the 168 tooth as Kenny mentioned.

you mention a 14" flywheel, that is the 168 tooth flywheel.

ring gears are stocked at Carquest, Napa, O'reilies, Auto Zone, Advanced Auto and pep boys.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
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50,796
BTW, once you have the flywheel out of the boat

buy ring gear
put ring gear in oven on 350 degrees
while the ring gear is warming up - use a chisel, cut off the old one (or heat with a torch fast and have it fall off)
use wire brush to clean up flywheel
stick flywheel in freezer
crack a beer
wipe your brow
finish the beer
remove flywheel from freezer and set on garage floor. (dont set on the wife's new granite counters)
put on welders gloves (or grab oven mitts), retrieve ring gear from oven, drop onto flywheel

it is now heat shrunk in place

use welder, tack weld in 3 areas

crack another beer

reinstall flywheel
 

B Rad G

Seaman Apprentice
Joined
Jun 24, 2018
Messages
44
I picked mine up at AutoZone for $19. 168 teeth. Turned my grill on as high as it would go and set it in there for about 10 min. I had never done this before, but its a pretty easy job.
 

kenny nunez

Captain
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Jun 20, 2017
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3,383
I can remember some of the old timers telling me how you could not beg, borrow or steal parts like that during WW2 and the only cure was to flip the gear and hope for the best.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
50,796
I can remember some of the old timers telling me how you could not beg, borrow or steal parts like that during WW2 and the only cure was to flip the gear and hope for the best.

These days, sunday at 11pm and needing the car the next day is the only reason to flip a ring gear.......
 
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