Suzuki 140 fuel burn, 2 stroke vs. 4 stroke - The Hull Truth

capt.gene · 06-28-2003, 01:29 PM

I have a 26'Twin Vee Hawaiian Fisherman with a big half tower, powered by twin 140 hp 2 stroke Suzuki's. My boat is always heavy loaded with people and dive gear, sometimes 16 scuba tanks and 6 divers.
At 4500 rpm I am running about 26 knots and burning 10.6 gallons per side, or about 22 gph. according to my flow scan.
A chart on the Suzuki web site shows the 4 stroke 140 as burning only 6.5 gph at fast cruise, and the 140 2 stroke burning 10.6 gph at the same rpm. and running the same speed.
If this is accurate, I want to re-power tomorrow. But, OMC taught me a long time ago to not trust advertising copy.
Anyone with first hand experience care to confirm these numbers? Sounds too good to be true.

Chuck B · 06-30-2003, 05:41 AM

Capt. Gene,
Earlier in the posts there is a post on Suzuki 140 where different owners talk about the engine, performance and its fuel burn. I would contact several of those folks to get the answers you want. The 140's are good engines and much improved over the 140 two strokes which are punched out 115's.
Chuck B

Team Binnion · 06-30-2003, 09:17 AM

Those number should be very accurate.

Team Binnion
Fish Hard or Go Home/24 Cape Horn

SeaPA · 06-30-2003, 05:25 PM

Based on my experience after a few weeks of owning a pair of DF140's those numbers look pretty accurate.

Dennis
23' Yellowfin

AW · 06-30-2003, 07:22 PM

I have the Suzuki 140 4-stroke on a Polar Bay 1910. It weighs about 3000 lbs. loaded. I get such good gas milage that I tap the gas gauge to see if it broke.

SCAngler · 07-01-2003, 08:04 AM

the 140 4 stroke should be 25 to 30 % better than the 2 stroke 140.

finbox · 07-01-2003, 09:10 AM

seapa,

What is your top end and cruising speeds on your Yellowfin?

Thanks,
Finbox

FishEye · 07-01-2003, 09:10 AM

Capt Gene -

Your 2 stroke motors may have tuning or other issues. I have a 29' Stamas with twin 250 two strokes and I get 22gph (total for both motors) at 33mph. At 28mph I am under 18gph. I would expect your boat to do much better than that even with 2 strokes.

BlueMarlin · 07-01-2003, 09:12 AM

I went to the suzuki website... there performance numbers with the 140 4-stroke are NO better than what I get now.. with 150 carbed yamaha's..... interesting.

SeaPA · 07-01-2003, 12:43 PM

Top end with a light load is 49, the boat really loves to run and seems to cruise comfortably between 34-37 mph with little variation in fuel usage.

Dennis
23' Yellowfin

BlueMarlin · 07-01-2003, 01:43 PM

thats a sweet looking ride Dennis.

The lines kinda remind me of a 24 or 27 cape horn....