prop help for a 25hp bigfoot 4-stroke

[bassndude112]

Hi,<br /><br />I'd like to increase my top speed. Currently I'm barely getting up to plane (19mph) on my 15ft smokercraft aluminum (1000lbs gross). The recommended rpm is 5500-6000 and I'm at about 6000 rpm WOT on a 10 7/8 x 11" prop. <br /><br />Through reading eariler posts, I found that I could go up to 2" to a 13" prop. However, after using mercury marines prop selector, it recommended that I should use a 10 1/8 x 15". <br /><br />My question is can I really go up to a 15" and if so is this because of the smaller diameter? Or should I just go with a 13" ? I'd appreciate any opinions on this. <br /><br />Thanks,<br />Sunny

 

[bassndude112]

Re: prop help for a 25hp bigfoot 4-stroke

anyone? please..

 

[ob]

Re: prop help for a 25hp bigfoot 4-stroke

You could trial run both props.Only a water test will confirm final results.The rest is ballpark.

 

[Fouled Plug]

Re: prop help for a 25hp bigfoot 4-stroke

As you're probably already aware, the 'Bigfoot' series of motor is more pontoon-oriented. The larger/deeper gearcase will cause more drag than a standard motor. You are powered for grunt, not speed. You can play with other props and most likely get a few more knots, but not as much as a comparable "normal" engine.