Yamaha 130 V4 2 Stroke fuel consumption

hoops2 · 30 July 2013, 20:22

I am currently looking in to the viability of my diving clubs boats with regard to costs per dive, our Yamaha 130 2 stoke V4 appears to be burning 3 litres a mile when run at 3800 rpm and about 22 knots with 6 divers and kit in our 5.8 m tornado rib. The engine is serviced annually with new plugs and filters and starts first turn with no problems.

From the wealth of experience on this site could anyone give me some indication as to whether this consumption is to be expected, I know 2 strokes are thirsty beasts but this seems excessive.

Thanks guys in advance.

lifeboatman3 · 30 July 2013, 21:03

Thats about right amount if anything its very good as there is a lot of weight there. I have a Humber 6mtr sigle console with nothing in it just me. I have a 115hp V4 Johnson and burn a little less but the boat hardly weighs a thing. I have found that 3000rpm is the best economy speed and I get 1ltr per mile at that.

hoops2 · 30 July 2013, 21:23

Thanks for the feedback, I suspected that might be the case but was hoping we may have a tuning problem. The tubes of the boat are pretty poor so the boats not worth much hence replacing the engine with a 4 stroke might not be worth it. A 14 mile trip in rough seas where we couldn't get on the plane cost us £90 a couple of weeks ago hence the cost investigation.

Tim M · 31 July 2013, 00:38

Quote:

Originally Posted by hoops2

I am currently looking in to the viability of my diving clubs boats with regard to costs per dive, our Yamaha 130 2 stoke V4 appears to be burning 3 litres a mile when run at 3800 rpm and about 22 knots with 6 divers and kit in our 5.8 m tornado rib. The engine is serviced annually with new plugs and filters and starts first turn with no problems.

From the wealth of experience on this site could anyone give me some indication as to whether this consumption is to be expected, I know 2 strokes are thirsty beasts but this seems excessive.

Thanks guys in advance.

Did I see that at Sea Palling a couple of weekends ago? Sounds a bit OTT to me....

hoops2 · 31 July 2013, 20:33

Yep the club were there last weekend but I wasn't with them, they used 40 litres on a trip to the alster and back so approx 12 miles. I'm not sure what we could do to reduce this.

captnjack · 31 July 2013, 20:42

Quote:

Originally Posted by hoops2

Yep the club were there last weekend but I wasn't with them, they used 40 litres on a trip to the alster and back so approx 12 miles. I'm not sure what we could do to reduce this.

Skip the tanks and free dive?

hoops2 · 31 July 2013, 21:41

I will suggest this at the next club meeting :-)