high thrust

[adam b]

can some one tell me what the high thrust gear box does , does it make you go faster an have less power or slower with more power

 

[New2me]

Re: high thrust

I belive its has larger gears with a lower gear ratio.But dont quote me on this.

 

[adam b]

Re: high thrust

so does this mean itll go faster than an engine without a high thrust gear box

 

[Captain Paul]

Re: high thrust

The Yammi T8 looks like it runs a much bigger prop too. Makes sense with different gear ratio.

 

[rodbolt]

Re: high thrust

the T gearcase swings a larger dia wheel and is desined more for a displacement speed rig such as a kicker on a large sailboat or barge type vessel.
the F gearcase is designed for planing speeds.
yes the gear ratios are different as is prop selection.

 

[gss036]

Re: high thrust

It is the same principle that is used with trucks. Most regular 2 wheel drive trucks will probably have 3.21 gears, 4 wheel drives have 4.50 to 4.88 gears
T8 and T9.9 are ideal motors for trolling a 21 ft or large boat for salmon fishing or other trolling methods.
There is no way you are going to get enough speed out of an 8 to 15 hp kicker to plain a 21 ft or larger boat. I just replaced a 15 hp Honda with a T9.9 Yamaha and it handles my 23 WA much better than the Honda. Honda, Tohatsu(Mercury), and Suzuki all have high thrust motors now.