• Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter

Gas <what octane level?>

match308

Well-Known Member
Messages
17
Reaction score
10
Points
57
Location
DFW
Boat Make
Yamaha
Year
2018
Boat Model
Limited S
Boat Length
24
Is regular gas the best option for the Yamaha? I’ve always been told that Premium was necessary for all boat engines.
 

seadude

Jet Boat Addict
Messages
190
Reaction score
106
Points
122
Location
NJ
Boat Make
Yamaha
Year
2016
Boat Model
242 Limited S E-Series
Boat Length
24
Pretty sure Yamaha recommends 89 pump octane for the 1.8l engines - that's all I can get a the Jersey shore and they run fine.
 

captras

Jetboaters Captain
Messages
1,224
Reaction score
1,347
Points
242
Location
Lake Livingston, Texas
Boat Make
Yamaha
Year
2016
Boat Model
242 Limited S E-Series
Boat Length
24
Manual says minimum Recommended fuel. ..86 Oct. Page 114 2016 242 limited SE. I use 87 with no issues! Premium is a total waste of money! If you don't mind the extra cost you are better to use 87 no ethanol fuel!
 

haknslash

Jetboaters Fleet Admiral
Messages
7,550
Reaction score
8,939
Points
547
Location
Lake Martin, AL
Boat Make
Moomba
Year
2019
Boat Model
Other
Boat Length
23
You run 86 in it. Lowest we have here is 87 and that would be fine too. I run the cheaper regular ethanol at your local gas station but I also use Stabil.

Here's the AR240 owner's manual...

image.png
 

match308

Well-Known Member
Messages
17
Reaction score
10
Points
57
Location
DFW
Boat Make
Yamaha
Year
2018
Boat Model
Limited S
Boat Length
24
Thanks. Great to know
 

swatski

Jetboaters Fleet Admiral 1*
Messages
12,806
Reaction score
18,566
Points
822
Location
North Caldwell, NJ
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
True for the Yamaha JB engines, certainly the N/As that do not even have knock sensors - like in my boat.
But - if you drive a Toyota, then I don't know about that...
93 certainly makes a difference. I figured it costs me about two Starbuck drinks - which I don't do anyway, lol - to fill up my truck with 93 vs 87, so I do it all the time!
https://jetboaters.net/threads/premium-vs-regular-93-or-87-octane-for-your-tow-vehicle-toyota-trucks.19891/

--
 

Hilario Perez

Jetboaters Lieutenant
Messages
434
Reaction score
322
Points
167
Location
Kissimmee FL.
Boat Make
Yamaha
Year
2011
Boat Model
SX
Boat Length
24
I use 87 and at least 2 times in the season here in Florida I put in seafoam and the boat run awesome. Two weeks ago me and 3 other buddy's of mine ran from Malabar to Fort Pierce and I had 4 adults
And my SX 240 was running 51 to 52 mph.
 

swatski

Jetboaters Fleet Admiral 1*
Messages
12,806
Reaction score
18,566
Points
822
Location
North Caldwell, NJ
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
I use 87 and at least 2 times in the season here in Florida I put in seafoam and the boat run awesome. Two weeks ago me and 3 other buddy's of mine ran from Malabar to Fort Pierce and I had 4 adults
And my SX 240 was running 51 to 52 mph.
If anything, Yamaha 1.8 N/As run a tad faster on 87. That’s been my experience and others.

That said, if given a choice I would always buy non-ethanol for a boat. We don’t have that choice though around here.

 

iamcalled

Jet Boat Lover
Messages
130
Reaction score
97
Points
77
Location
Carrollton Texas
Boat Make
Yamaha
Year
2018
Boat Model
AR
Boat Length
24
Along this line what do y’all do to store your boats for winter as far as fuel left in the tank. Was going to use stabil which says to fill tank to 95% full then add 1oz for every 2.5 gallons but i figure these tanks are aluminum or poly and won’t condensate. Thoughts?
 

swatski

Jetboaters Fleet Admiral 1*
Messages
12,806
Reaction score
18,566
Points
822
Location
North Caldwell, NJ
Boat Make
Yamaha
Year
2016
Boat Model
AR
Boat Length
24
Along this line what do y’all do to store your boats for winter as far as fuel left in the tank. Was going to use stabil which says to fill tank to 95% full then add 1oz for every 2.5 gallons but i figure these tanks are aluminum or poly and won’t condensate. Thoughts?
Absolutely, positively, use Stabil for long term storage with any E10!

--
 

2kwik4u

Jetboaters Fleet Admiral
Messages
7,352
Reaction score
9,384
Points
532
Location
Georgetown, IN
Boat Make
Yamaha
Year
2017
Boat Model
AR
Boat Length
19
Absolutely, positively, use Stabil for long term storage with any E10!

--
I'm over cautious. I fill with E-0 "rec fuel" from the rural station, then add Stabil on top of that for storage.
 

captras

Jetboaters Captain
Messages
1,224
Reaction score
1,347
Points
242
Location
Lake Livingston, Texas
Boat Make
Yamaha
Year
2016
Boat Model
242 Limited S E-Series
Boat Length
24
Along this line what do y’all do to store your boats for winter as far as fuel left in the tank. Was going to use stabil which says to fill tank to 95% full then add 1oz for every 2.5 gallons but i figure these tanks are aluminum or poly and won’t condensate. Thoughts?
Use Stabil 360 rather than regular stabil. It is a little more expensive, but designed for marine purposes. Plus it is 1oz per 10 gallons.
 

Papa

Jet Boat Junkie
Messages
168
Reaction score
81
Points
142
Location
Lake Sinclair GA
Boat Make
Yamaha
Year
2013
Boat Model
242 Limited S E-Series
Boat Length
24
X2 on Stabil 360. Keeps my lawn equipment running also.
 
Top