What Gear Case to Run?

[DaGadget]

Hey this is my first post here and I am glad to be onboard! My question is though it may seem stupid I have to ask.I have a '91 hydrostream V-KingYT with a '93 Merc 150 with a detwiler jack plate it runs decent even with the small hp turning a 26" 3- blade big ear chopper the question is what differences would i occur from changing gear ratio's? because I have two lowers to use 1)1.87:1 2)2:1 please help with advice Thanks in advance

[motion]

With your combination as long as you have a prop that allows the engine to maximize rpm & mph for each gearcase it will not make much difference, except for the obvious ie: gear ratios. An xr4 or xr6 gearcase that utilizes a 1.78 ratio and a smaller diameter gearcase would make an improvement in your boats top end. Many pad boats like yours that are properly set up will see a 4-6mph improvement. Joe /////////// abellera5@uneedspeed.net
[This message has been edited by motion (edited January 27, 2002).]

[snappertapper]

this is probly true but im not sure because on a old style vector the motor that will turn a larger diameter wheel will be faster simply because of the blade difference
bigfish1229@aol.com

[Skaterfast]

On my twin promax Skater I went from 1.5 gears to 1.87.With the 1.5 gears I was hitting the 6,500rpm rev limiter at 96 or 97.Now with the 1.87 gears I hit 102 at around 6,300.All this was with 34" wheels.

[Skaterfast]

Originally posted by Skaterfast:
On my twin promax Skater I went from 2:1 gears to 1.87.With the 2:1 gears I was hitting the 6,500rpm rev limiter at 96 or 97.Now with the 1.87 gears I hit 102 at around 6,300.All this was with 34" wheels.

[DaGadget]

Thanks
Motion,Snappertapper and Skaterfast
your info is helpful to me. Now its decision time....Bob

[motion]

I have an xr4 gearcase available for sale if you want to put one on your boat. Let me know. Joe ///// abellera5@uneedspeed.net