What is my Gear Ratios?

[longstand]

I have the manual and it show my gear rations:

Gear Ratios
UPPER LOWER TOTAL
21:20 14:26 .57



-----------------------
My Prop that is currently install and i believe is the original. is 15X17

I believe 15 is my DIAMETER
17 is Pinch

TWIN OMC *GM* Engine is V6 3.8 L (170HP Each Engine)


---------------------------------

What is the best prop for my boat. The boat will be usually load with about 5 or full load of people..

i want a all around good prop.

 

[steelespike]

Re: What is my Gear Ratios?

My info indicates 1.77:1 rpm rating is 4,200-4,600.
The best thing to do is run your present props with a light load and a typical load.
remind us of the prop size, that it is a twin,and and your max rpm and speed in reach run.This way we can tell if there are any underlying problems.

 

[longstand]

Re: What is my Gear Ratios?

i found that information from my Repair Manuel..

i will double check