Re powering my Monaro 24 with a 300 hp outboard. What 300 to use

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my 2024 df350a is most economical at 4300 rpm at 25 knots (28 mph), I burn 50 liters an hour ( 13.2 gph). 26ft northwest aluminum craft.

How much does it weigh.

 

[sudsy]

How much does it weigh.

Haven't put it on a scale but my estimate based on my tongue weight is around d 7500 lbs

 

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About 2 k lbs more than the 28 foot 8.6 kf I've been on.. and almost identical fuel economy. Best I can get is around 2knots per gal. 350 verado.

Impressive

 

[Doubleheader]

That’s really good fuel economy you’re getting, nice rig. I’m a mechanical binnacle guy, so the 250 Suzuki or the 300 merc sea pro are my pics. Buddy runs a fleet of sea pros out of Zeballos and has nothing but good reviews. The 300 has proven itself and is available with mechanical or fly by wire.
Haven’t priced a new motor out, scared to with the tariffs.
Good luck with your hunt!

 

[wolf]

Also check on warrnty lengths, to me thats a game changer

 

[Samnjoe]

Also check on warrnty lengths, to me thats a game changer

Agree on the warranty. Very important with this tech. I got full coverage 6 year warranty on all 3 new Yamahas.

 

[ab1752]

Merc has a 7 year promo to July 10th...i bet it is extended tho.

 

[wolf]

Merc has a 7 year promo to July 10th...i bet it is extended tho.

thats awesome , unfortunatlly here in vic area unless you wanna haul boat up island no dealer down here

 

[Pineapple Express]

Merc has a 7 year promo to July 10th...i bet it is extended tho.

You gonna hang a pair of Merc 225s on the back of your Islander any time soon?!

 

[ab1752]

Local dealer support is 100% necessary regardless of warranty duration. Hauling out and towing in sucks.

Id lean into a massive single for my barge.

 

[tains]

That is some incredible economy. My boat is much lighter and I'm not close to those numbers.

24ft seasport etec 300 I'm in the 12's around 4100 pushing 30mph

 

[Samnjoe]

My KF 28 twin Yam 150s fully loaded fuel water 300 pounds of fish 4 people. 1.8 mpg at 30 mph. My buddy same boat with 200s is the same. My other buddy same boat Seapro 400 1.5 mpg.
Those are real no BS numbers

 

[Buckethead905]

Repowered last year with a 300 Yamaha on my Pursuit 2470.. 17P SWS2 prop.. this is pretty much best case scenario for economy, if it’s rough out or I’m fully loaded with fuel I’m around 2.6-2.9 MPG

 

[Rain City]

Repowered last year with a 300 Yamaha on my Pursuit 2470.. 17P SWS2 prop.. this is pretty much best case scenario for economy, if it’s rough out or I’m fully loaded with fuel I’m around 2.6-2.9 MPG

View attachment 118100

That's nuts

 

[Buckethead905]

I run at 4100 to 4300 doing 26 to 29 mph depending on water conditions best is when its about a 1 foot chop

Pretty incredible you’re running the same speed as me, turning your engine 400-600 rpm faster, on a boat that weights a few thousand pounds more than mine and only burning a half a litre more fuel. Would love to see the live data on that with a photo.

 

[Buckethead905]

That's nuts

Well apparently it’s not when dual prop 350 zukes hung on a bigger and heavier boat are matching my economy

 

[Samnjoe]

Are you guys setting your systems to US gallons or imperial gallons?

 

[Buckethead905]

Are you guys setting your systems to US gallons or imperial gallons?

US gallons

 

[brutus]

Well apparently it’s not when dual prop 350 zukes hung on a bigger and heavier boat are matching my economy

Some boats are harder to push, I know Grady’s are not that fuel efficient , hull design, deadrise and a lot of factors involved, props, gear ratio and I can go on( dual prop) single prop, Suzuki have a reputation to be good on fuel, see on mine I just put gas in it and send it lol

 

[Weatherall]

Price it out, but a 300hp Suzuki was over $10k less then a Yamaha at the time. Warrantee and Tourque are also considerations. I've been on the Suzuki for a couple of years, and just love the motor.