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Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 8:09 pm
by SthrnStyle3
Looking at possibly buying a precision gearbox and need to know what to look for to make sure I don't buy something broke or wore out! What do I check for and how do I check it???

Also, I have some other questions... Are precision boxes interchangeable with any other boxes, as far as bolt patterns and rigging mounts and what not?

This box will be going a 12x7 hull.. A little small I know, but the guy I bought my hull from had a small block and gearbox on this boat before. Any opinions on this setup? I'm limited to a smaller prop and I'm leaning towards a 76". Motor will be fairly stock, nothing special. Any recommendations on a prop?? Thanks in advance guys!

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 8:15 pm
by skinny99
They are decent boxes. A little loud off idle so don't be scared after you first run it. Guy that builds them is out of Oviedo. He can prob check it out. At 76" long max a 3 blade R would prob be fine if it makes over 300hp. I had one with a 2 blade @ 79" and about 290hp. Worked good.

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 8:29 pm
by Deano
SthrnStyle3 wrote: . . . Also, I have some other questions... Are precision boxes interchangeable with any other boxes, as far as bolt patterns and rigging mounts and what not? . . .
If I recall correctly the bell housing pattern is Chevy only. They don't have the BOP pattern like the other boxes do.
If you're running and staying with a Chevy, that won't matter. If you're doing something else, this can't be overlooked.

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 8:35 pm
by Bruce
theyre cheap enough new id probably just buy a new one that way u dont end up with junk

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 9:45 pm
by SthrnStyle3
I've been direct drive for the last 6 years or so and I ended up finding this box for 1000.. I'm so ready for a change! As for staying with the Chevy pattern, that looks highly likely. I don't see myself getting into something high tech and high performance for awhile. I'm going to look at the box tomorrow, what should I look for? Should there be any end play or little to none? Do I need feeler gauges maybe?? I know I'm going to check the magnetic drain plug(if it's magnetic) and look at the oil. Any other recommendations?

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 9:55 pm
by Deano
Their contact info is here:

http://www.airboatgeardrives.com/index.html

I would call them in the morning and ask the source, nobody else would know better.

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 10:10 pm
by Gangreen
12 by 7 is a good size.

Re: Need info on gearbox ASAP.

Posted: Tue Sep 23, 2014 10:15 pm
by Birddog247
Deano wrote:Their contact info is here:

http://www.airboatgeardrives.com/index.html

I would call them in the morning and ask the source, nobody else would know better.
Exactly what i did when i bought a used one. Ask for voughn he loves talking about his product. if i remember correctly there was some beneficial knowledge i gained from him in regards to the output shaft. some are 12 spline which is the bigger stronger one and then there was an 8 spline that was smaller or something like that.