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350sbc reduction ID help

Posted: Mon Jul 02, 2018 5:37 pm
by Bowhnt
After much internet search and a long talk with the guys at whirlwind I’m not sure what I have and what I need. I was shopping for a new prop for my first boat and spoke with whirlwind and they weren’t sure exactly what kind of reduction I had so I’m hoping I can get some input.

I have an 84 panther with a 350 sbc and some sort of reduction. The only markings I can find are for Warner gear division Muncie Indiana and The number F1-68 stamped on the the housing.
Hoping I can get some input on what it is and what the reduction would be or any other info Thanks in advance!

Re: 350sbc reduction ID help

Posted: Mon Jul 02, 2018 5:47 pm
by JAMES
Bill roberts use to take them which is an AC GEARBOX and convert the gears to work with sbc caddie ect they are great boxes you will need the adapter if you dont have it but by your post i assume you do they are 1.5 1.7 if im not mistakin works well with caddies and bb engines the sb need more gear jmo but they will work with your set up fine run a 2.0 or ex 3 bld u be good to go

Re: 350sbc reduction ID help

Posted: Tue Jul 03, 2018 1:57 pm
by Bowhnt
Much appreciated ! That helps a lot. Now I can finally get a prop ordered. Now just to figure out my starter issues. Tried the three different 350 sbc starters and can’t seem to get a good fit. They are all staying engaged tearing up the flex plate.

Re: 350sbc reduction ID help

Posted: Wed Jul 04, 2018 6:48 pm
by Bowhnt
JAMES wrote:Bill roberts use to take them which is an AC GEARBOX and convert the gears to work with sbc caddie ect they are great boxes you will need the adapter if you dont have it but by your post i assume you do they are 1.5 1.7 if im not mistakin works well with caddies and bb engines the sb need more gear jmo but they will work with your set up fine run a 2.0 or ex 3 bld u be good to go


What type of oil is recomended for it and how much? Are most guys running aviation oil?

Re: 350sbc reduction ID help

Posted: Wed Jul 04, 2018 9:10 pm
by skinnypockets
Bowhnt wrote:Much appreciated ! That helps a lot. Now I can finally get a prop ordered. Now just to figure out my starter issues. Tried the three different 350 sbc starters and can’t seem to get a good fit. They are all staying engaged tearing up the flex plate.
On the older blocks it was sometimes necessary to add shims under the starter to get proper clearance. You should be able to find them at NAPA.
:rebel: :florida: :old_glory:

Re: 350sbc reduction ID help

Posted: Thu Jul 05, 2018 10:46 am
by Bowhnt
skinnypockets wrote:
Bowhnt wrote:Much appreciated ! That helps a lot. Now I can finally get a prop ordered. Now just to figure out my starter issues. Tried the three different 350 sbc starters and can’t seem to get a good fit. They are all staying engaged tearing up the flex plate.
On the older blocks it was sometimes necessary to add shims under the starter to get proper clearance. You should be able to find them at NAPA.
:rebel: :florida: :old_glory:


It took me a while bit finally got it! Boat is pretty much ready to run once I confirm how much oil and what kind for the gear box.

Re: 350sbc reduction ID help

Posted: Thu Jul 05, 2018 11:22 am
by kwanjangnihm
Bowhnt what size prop you looking to run? (diameter, # blades, model)

Re: 350sbc reduction ID help

Posted: Thu Jul 05, 2018 11:01 pm
by JAMES
The oil its self im
Not sure but i thought they was built to run with oil pressure from the engine not sure on oils ect make a tread asking what oil for the lycoming box used on sbc

Re: 350sbc reduction ID help

Posted: Thu Jul 05, 2018 11:03 pm
by JAMES
Air roberts on hear is who u need to talk with also turtle aka robert wright been running one for yrs yrs

Re: 350sbc reduction ID help

Posted: Fri Jul 06, 2018 7:18 am
by SWAMPHUNTER45
No one has more hours on a Roberts than the (Turtle) screen name PONTOON OUTLAW !

That dude has put the Roberts drive to the test it is mated to a Branch Series 3, 507 cubic inch Cadillac.

Re: 350sbc reduction ID help

Posted: Tue Jul 10, 2018 9:56 pm
by 90chevy396
Wouldn’t mind having that box on my Buick let me know if you decide to go a different route


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