What is my gear ratio?

[Holy Shamolee]

I have a volvo 280 leg.
The motor is out of the boat.
I turn the shaft in my bell housing approx 1 and 2/3 turns to make my prop turn once.
I'm thinking this is probably the 1.65 gear ratio that a guy is always hearing about.

But I thought it was the other way around and one turn of the shaft turned the propeller 1.65 times.

I dunno.

 

[jestor68]

Re: What is my gear ratio?

You're thinking correctly. A 2:1 gear ratio means it takes 2 revolutions of the crank to turn the prop 1 revolution.

 

[Holy Shamolee]

Re: What is my gear ratio?

Thanks.

 

[Maclin]

Re: What is my gear ratio?

The more revolutions of the shaft you make the more accurate the math formula can be, just sayin'...

 

[Holy Shamolee]

Re: What is my gear ratio?

The more revolutions of the shaft you make the more accurate the math formula can be, just sayin'...

I hear you, but I get confused when I count past 3.

 

[Maclin]

Re: What is my gear ratio?

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