What do you get out of a tank of gas?

Just like a car it really depends on how you drive. Sea-doo claims the 900 h.o. model will use 2.4 gallons per hour ( 1.9 non h.o.). Anyways I own the h.o. model and I would say I burn 2.5 gallons per hour. However my girlfriend who rides less aggressive (pretty slow actually ha ha) uses at most 2 gallons per hour. Pretty awesome considering some of my friends who have 260hp and 215hp supercharged skis use 10++ gallons per hour . SERIOUSLY. I guess that's why they put 20 gallon tanks on those things and only 7 gallon on the spark.

Stock 60hp can burn the tank in 2 hours . that's my 11 yr old daughters.
VTECH 109hp 1hr 45min.
When I ride I can get 6 hours on a tank on the VTECH tune.
mods WORX exhaust and ribbon removed

I ride very aggressive with my 90 HP model, and can get near 4 hours

depends on conditions and how you drive it, if you are going to putt around on it a tank will last a long time, run it at full throttle and that's a different story, I figure they are about half the cost to operate than what my 110hp two strokes used to be with what I used to put in them for fuel and injection oil. I was out last weekend for about 2 hours and used about 20 liters of fuel.

I think the octane of gas folks are using should also be mention as that also might factor in.

seaking said:

I think the octane of gas folks are using should also be mention as that also might factor in.

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isn't the recommended octane 87 on this ski? is anyone running higher octane? if so do you see much difference in performance?

E90mike said:

isn't the recommended octane 87 on this ski? is anyone running higher octane? if so do you see much difference in performance?

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that's interesting - you can't get anything lower than 92 Octane in Australia so I wonder what we're supposed to do lol? i use 98 octane in my motorcycle and that's what I was planning on using in the Spark.

there's barely any places that have 85 Ethanol at all - certainly only a couple where I live.

If you have the VTECH tune it is recommended that you run 98 octane on the stage 1 tune. This is for OZ. I believe the equivalent in the USA is 94 or 95.
If you have the stock tune it is recommended to run 87 or a RONoctane of 91.

You need the E85 tune to run E85 .

yeah i'll be stock for a little while - but won't have any choice other than 92 or up....

Higher octane will never hurt, just doesn't benefit you any on a stock machine.


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Just did a run on the St. Johns River today from Sanford up to Silver Glen Springs and back. Started with a full tank, stopped once for fuel and put in 6 gallons after about 60 miles. This was a mix of extended no wake/idle zones and smooth ~40mph running. Really impressed with the fuel economy on that leg. On the way back, I opened the throttle up a bit more (some nice 15 minute WOT legs!) and ended up back on the trailer with about a half tank. I'd estimate total fuel usage for the day was around 10-11 gallons. In total it was a 95 mile run today. I'm beat but it was worth it!

Tash Neame said:

yeah i'll be stock for a little while - but won't have any choice other than 92 or up....

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Just run 98 like you would in anything else .it won't hurt. And you may get slightly better fuel economy.

Used 7.2 gallons in 3.75 hours on a 2 up Spark with the HO motor. That comes out to be about 1.9 gallons per hour but I was keeping it in 1/2 to 3/4 throttle range because I was still in the break-in period.
Was riding in the St. Johns river near Sanford - mostly calm water.

The ski was complaining loudly and more frequently as I got really low on fuel but at least it gave me plenty of warning.
Can't wait to ride it some more!

Cormacs said:

Higher octane will never hurt, just doesn't benefit you any on a stock machine.


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I bought my Spark last year and just assumed it was tuned for 93 octane, up till two weeks ago that's what I was always using.. My Ski would see 53 MPH, and now with 87 octane I can only manage 48 MPH. The temp has been up 10-15 degrees but not sure that would make that big of a diff

Sburke said:

I bought my Spark last year and just assumed it was tuned for 93 octane, up till two weeks ago that's what I was always using.. My Ski would see 53 MPH, and now with 87 octane I can only manage 48 MPH. The temp has been up 10-15 degrees but not sure that would make that big of a diff

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I get 54 mph all day long on 87 octane. Fuel would not make a difference, aside from quality anyways. But heat definitely will. The Sparks are bad for heat fade and will loose performance as the temperature increases. All the higher octane helps with is detonation on higher compression engines or engines running increased timing. These machines in stock format will not have pre-ignition on 87 octane.


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Cormacs said:

I get 54 mph all day long on 87 octane. Fuel would not make a difference, aside from quality anyways. But heat definitely will. The Sparks are bad for heat fade and will loose performance as the temperature increases. All the higher octane helps with is detonation on higher compression engines or engines running increased timing. These machines in stock format will not have pre-ignition on 87 octane.


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I was just assume it was pulling timing with the 87 because of the heat, 93 might have made that not happen.

Sburke said:

I was just assume it was pulling timing with the 87 because of the heat, 93 might have made that not happen.

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These machines don't have knock sensors so they have no way of adjusting for pre ignition. So it would have no way of adjusting timing due to the heat and lower octane levels.


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