Propeller Question for 2005 42' Sedan w/ Cummins 450's

[Jeff L]

I am looking to pick up a spare set ... Questions
1. Prop specifications (first to have mine rebalanced this layup)
2. recommended place to purchase spare.

I appreciate any information .

 

[swaterhouse]

Best thing to do is load up the boat to about as heavy state as you would normally run (like before a longer trip) and get fuel burn numbers at 100 rpm Intervals from about 1800 RPM up to full throttle. Let burn settle for few minutes at each increase. If windy or there is a current you really should do runs in both directions.

Then compare these numbers to the specs (easiest found on sbmar.com website). You should be below the fuel curve. Give this info to your prop company, they can help make recommendations on shere to start.