what is your return policy???

[lime4x4]

i have a 1.47 upper unit not even a month old yet. It seems my boat with a v8 small block doesn't like this ratio. Even thou from everything i've read and was told this is the correct ratio for this boat. The boat in question is a 1986 searay 268 weekender with a 5.7 liter 4bbl carbed engine. The boat weighs 5400 lbs without fuel,gear and people. Current prop that works the best is a 15.25X15 3 blade alum. my max speed is around 30 mph with a wot of 4100. if i go down to a 16X13 3 blade alum prop.My max speed drops to 18 mph with a wot of 4500. I'm thinking i need to go up 1 gear ratio.
By the way the boat originally had a 1:98 ratio upper drive unit.

[Tech Support]

If you are not above 3,500 ft elevation you should be running the 1.47 ratio drive. You can visit: http://sites.mercurymarine.com/porta..._schema=PORTAL, to help select the proper prop for your boat.

Tech Support

[lime4x4]

thanks. I'm using the correct prop according to that website. I have the original paper work that came with the boat when boat new. It lists 2 outdrive ratio the 1.50 and the 1.65 ratio. But it doesn't say anything about elevation.

[Tech Support]

If you are above 3500' elevation you would use the 1.65 ratio and above 6000' you would use the 1.84 ratio.

Tech Support