Yammy 60-70 4st fuel usage?

[hellfish]

Hi all. I am wondering dose anyone own a yammy f60 or the new f70 and if so what sort off fuel consumption have you been getting? I am about to buy one off these (the 70 if i hav the $$) and am building an ally fuel tank for the boat. How big should i make it?

[NAGG]

My 60 yammi 4 stroke gives me around 100km on a 60lt tank (conservative) - pushing a 480 Hornet (2 blokes)

Chris

[Scott nthQld]

Geez Nagg, that hornet must be heavy to push through the water. I have a 60hp yam on the back of an older 4.8m quintrex and get and average of 2.5km per litre, but up to 3km per litre. My 60l tank gets me 150km, 2 blokes, loaded with gear, eskies ice etc

[NAGG]

Geez Nagg, that hornet must be heavy to push through the water. I have a 60hp yam on the back of an older 4.8m quintrex and get and average of 2.5km per litre, but up to 3km per litre. My 60l tank gets me 150km, 2 blokes, loaded with gear, eskies ice etc

I did say conservative :) - but it is heavy when you consider that there are 3 x 30kg of batteries on board / leccy / 60lt esky ..... and gear
Also that would be WOT a good deal of the time..... running on impoundments.

Chris

[perko]

I did 70 mile for 33 litres with a 60 on a 4.5 poly.

[hellfish]

Hmmm some mixed results but good info all the same. I like the sound of yours perko, but is that nautical miles or regular miles? Done some mesuring and i have just enough materials and can fit about a 130lt into the space i have in the boat. Floating bomb i know but it would make for some serious range. Still no one on here got an f70?

[Crusty Sea Dog]

Yeah mate, iv'e got the new 70 4st tiller on a 5.25m plate open boat.
Have no exact figures but going from scarborough to western side of moreton
and back it uses around 25L of fuel including a bit of running around over there.
Have been very happy with it so far. Have you got any prices on one yet? Cheers.

[mmmouse]

35 nautical miles (63 km approx.) per 25litre tank 60 hp yam 4 stroke on 520 quintrex dory = 2.5 km/l approx

[hellfish]

Yeah Crusty, that sounds like pretty good numbers. Moreton and back is a decent run. Im goin the tiller aswell. Got a few prices, they vary a bit. 9800-10,800. I only got a 4.6m tinny though so they dont really take me seriously when i tell them what i wanna put it on so im not sure if they are giving me a real price or not.

[Crusty Sea Dog]

Yeah Hellfish, I had the same sought of response when I was looking
around for prices one place called me tiller mad.I ended up going through Marine Tune and paid 10,350 all up for mine. That 70 on the back of your 4.6m tinny is gonna crack, mine does about 29 knots wot with only 2 people on board and minimal gear. Cheers mate.

[NAGG]

My latest figures with a repropped 60 Yammi 4 banger was 2.73 km / lt
(3 blokes) - 205km for 75lts

Chris

[BigE]

Always get 65kms + from a tote Tank (25lt) in any conditions ran one dry once and it was 75kms on the gps but that was in the creek. Prop them right and they get excellent ecom. mine is best at 4200 - 4500 rpm running at 5000 rpm or above increases fuel usage dramaticly

BigE

[maimai]

My latest figures with a repropped 60 Yammi 4 banger was 2.73 km / lt
(3 blokes) - 205km for 75lts

Chris

Great figures Nagg

[Ringoscar]

F70 with alloy 13.5" prop on Haines 4.45m, 3 big batteries, 82lb electric, 75L fuel, full offshore safeties, food, drinks, bulk tackle, 2 crew = 840kg total – no lightweight.
Peak fuel burn 21.8L/hr @ 6300rpm (per Yamaha gauge and Lowrance EP-60R) @ 27.9 knots GPS. Pleasant & cheap 20 knots cruise 16-18L/hr.
Previously max 29.4L/h with Yam 70B 2-stroke @ 29.6kts; 23L/hr @ 20kts.
Acceleration to clean 12kt plane, approx 1sec slower; initial torque slightly less, midrange torque comparable, revs out willingly despite load. F70 would really boogie on a lighter boat. Will stuff about with props when the fishing bores me.

[NAGG]

Great figures Nagg


Accurate figures too ....... wanted to check the economy in typical conditions that I will face up Boroloola
The repropping down from 13" to 12 made a hell of a difference (600 rpm)

Chris

[bugman]

I've got the fuel injected 60 on a 5m open tinny. It was always great on fuel economy but about 12 months ago I switched to premium unleaded and now its even better.

IMHO It works out cheaper to use premium. I don't run a fuel flow meter but working it out manually I'd be 2.75km per litre at worst to about 3.2 km per litre at best.

To give you an idea I live at Murwillumbah - near town. I put the boat in at the house - travel down the Tweed river - fish out to around the 9 mile trolling for around for about 4-6 hours - travel home back up the river and change over to the second 25ltr tank about Tumbulgum on the way home.

Not bad.

Brett