502's gallons per hour

[nokomis]

silverton 42 convertable
anyone have an idea of gal per hr for twin 502's at 1200 rpm. just got the boat and have no clue 550 gal of gas on board

thanks
Kevin

 

[Mischief Managed]

Re: 502's gallons per hour

silverton 42 convertable
anyone have an idea of gal per hr for twin 502's at 1200 rpm. just got the boat and have no clue 550 gal of gas on board

thanks
Kevin

Probably somewhere around 2-3 GPH at worst.

 

[Mischief Managed]

Re: 502's gallons per hour

Probably somewhere around 2-3 GPH at worst.

Per engine...

 

[Fireman431]

Re: 502's gallons per hour

I run 7.4L (454's) on a 37' (21,000 lbs), so your GPH should run about the same.

700 RPM = 4-5 MPH = .5-.8 GPH per engine
1000 RPM = 7-9 MPH = .8-1.0 GPH per engine
1200-1400 RPM = 10-11 MPH = 2.0-3.0 GPH per engine
2000 RPM = 14 MPH = 5-6 GPH per engine

Ready for this one? 24 MPH (4200 RPM) = 18-20 GPH per engine

All of this is based on power to weight ratios, proper tuning of the engines, hull condition, trim tab settings, boat load, etc.