Estimated fuel comsumption & others

[Sea Rider]

A friend of mine has a 20" open boat with a Mercruiser 3.0 Lt carbed engine, would like to know ;

How many CC would that engine be ?

What would be it's fuel consumption in gallons at wot with him alone ?

Min-Max RPM parameters for that engine ?

Thanks in advance

Happy Boating

 

[Bondo]

Re: Estimated fuel comsumption & others

A friend of mine has a 20" open boat with a Mercruiser 3.0 Lt carbed engine, would like to know ;

How many CC would that engine be ?

What would be it's fuel consumption in gallons at wot with him alone ?

Min-Max RPM parameters for that engine ?

Thanks in advance

Happy Boating

Ayuh,... Last I knew, there's 1000cc's in a liter, so, it's 'bout 3000cc's...

Gas consumption is an unanswerable question...

It idles at 650 rpms, 'n Wot is 4200 to 4800 rpms, dependin' on it's vintage...

 

[Sea Rider]

Re: Estimated fuel comsumption & others

Thanks,

Ooops, sorry, should have asked how many HP more or less for that given engine ?

About inboard motors, are they guzzler motors, would you say same consumption as 4 stokes outboards for same HP , definitely less guzzler than 2 strokes, right ?

Happy Boating

 

[Bondo]

Re: Estimated fuel comsumption & others

Ooops, sorry, should have asked how many HP more or less for that given engine ?

Ayuh,... They've been listed as anything from 115hp, to 140hp...

No motor is a gas sipper, at Wot...

 

[QC]

Re: Estimated fuel comsumption & others

You could use the old standard of 10% of horsepower as GPH at WOT. Not very accurate really, but that would be 14 GPH if it is a 140.

 

[achris]

Re: Estimated fuel comsumption & others

You could use the old standard of 10% of horsepower as GPH at WOT. Not very accurate really, but that would be 14 GPH if it is a 140.

That only works for 2 stroke engines.

As a guide, my 220hp 4.3litre V6 uses around 61 litres per hour at WOT (16 US gallons per hour).

Very little difference between a 4 stroke inboard and a 4 stroke outboard.

Chris......

 

[QC]

Re: Estimated fuel comsumption & others

I agree ^^^^ buuuuttt, even a modern 135 Merc 3.0 uses 11.5 gallons an hour which is no that far off

 

[Sea Rider]

Re: Estimated fuel comsumption & others

Thanks everybody for their tech contribution, will go for a spin with full tank, just in case. 2 strokes engine consumes near 12% of their HP at wot per gallon/hour.

Happy Boating

 

[Volphin]

Re: Estimated fuel comsumption & others

Well, if you are using too much fuel, you need a smaller girlfriend. LOL JK

V

 

[QC]

Re: Estimated fuel comsumption & others

That only works for 2 stroke engines.

2 strokes engine consumes near 12% at wot per hour.

To clarify, I think we mean 2 Stroke carbed . . .

 

[Sea Rider]

Re: Estimated fuel comsumption & others

Yeap, 2 strokes carbed engines, EFI's much less...

Happy Boating