est. fuel consumption?

[starsnstripers]

1974 28' Silverton 9500lbs w/ twin 225 Chrysler V8s inboards cruising at 10-12 knots @1800-2000 rpms. GPH? thanks

 

[Mischief Managed]

Re: est. fuel consumption?

14 to 18 GPH total, would be my guess, assuming it's not on plane at 10-12 knots. Though the GPH would be higher, that thing would probably be much more efficient (MPG) at 3500 RPM and on plane.

 

[DJ]

Re: est. fuel consumption?

Guessing that 1800 to 2000 makes that boat a wallowing pig, throwing HUGE wake. Not appreciated by other boaters and property owners.

Slow down OR get up on plane.

On plane, I'd guess 15 GPH per engine.

 

[QC]

Re: est. fuel consumption?

Slow down OR get up on plane.

Absolutely, 100% agree . . . Why are you running her there? She prolly has a 6 - 7 knot hullspeed, run her there or on plane . . . Sorry to pile on, but now I am curious . . .

 

[Mischief Managed]

Re: est. fuel consumption?

Dawned on me that a Chrysler 225 is only going to burn around 16 GPH at WOT, so I think I should revise my first estimate to 8 to 12 GPH total at 2000 RPM.

 

[starsnstripers]

Re: est. fuel consumption?

Dont forget the "PIG" has TWIN 225s thanks

 

[QC]

Re: est. fuel consumption?

Dude, it's the 10 - 12 knots that says she's digging a hole . . . not the 225's or the sweetheart of a boat . . .

 

[starsnstripers]

Re: est. fuel consumption?

Got it, Thanks for the responses. I think she'll be a thirsty girl. Now if the gass prices would stay at 1.50 or less, i'd consider getting it. Gas is going back up now so i'm gonna pass. 3000.00 for it is a good price and it's in great shape. Lotta maint. though. Oh well.