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Jan 23rd, 2013
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Yamaha 250 Sho fuel choice??? #13375637 12/18/19 12:44 AM
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SkeeterB Offline OP
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What octane fuel are y’all running with your Yamaha Sho? I’ve been running regular 87 but was told I need to be running at least mid grade to premium. I don’t feel I’m getting enough speed with my motor and FX21. I’ve ordered a new prop from Lake Linear Prop out of Georgia to help with performance .

Moritz Chevrolet - 9101 Camp Bowie W Blvd, Fort Worth, TX - Monte Coon (817) 696-2003
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375639 12/18/19 12:49 AM
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Brent S Offline
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Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375644 12/18/19 12:54 AM
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skeeterbugzx300 Offline
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what rpm & speed u getting out of it.

Re: Yamaha 250 Sho fuel choice??? [Re: skeeterbugzx300] #13375647 12/18/19 12:55 AM
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SkeeterB Offline OP
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5880 rpms 65 mph full tourney load.

Last edited by SkeeterB; 12/18/19 12:56 AM.
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375650 12/18/19 12:57 AM
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TomRom Offline
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I would run what Yamaha recommends, nothing more nothing less. I think the SHO 250 is suppose to operate best on 89 octane. Yamaha posts owners manuals for their engines on their website in case if you do not have one. It will tell you what they recommend.

Last edited by TomRom; 12/18/19 12:58 AM.
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375655 12/18/19 01:04 AM
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Dealer said 89 so that’s what I run, also only buy Shell or Chevron since I can’t get ethanol free, supposedly their gas is a little better, but who knows.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375673 12/18/19 01:28 AM
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You have to run 89 to get the full 250’horsepower. Fuel choice isn’t really optional with that motor.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375676 12/18/19 01:30 AM
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Owners manual calls for 89. I have goofed a time or two and used 87 and per dealer its no big deal here and tgere buy 89 will get you best overall performance.

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375695 12/18/19 01:54 AM
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David Burton Offline
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Originally Posted by SkeeterB
5880 rpms 65 mph full tourney load.


FX21 is a fairly substantial and heavy boat for the 21 foot size. It is almost the same hull as the old 'I-Class'. You are a little low on what I understand to be my top-end, but not by much. I do need to get my prop re-tuned, but I am getting a similar result, though my tournament load is pretty substantial (with me in it). I max at about 61 - 63 fully loaded with my partner.


David Burton
2015 Skeeter FX 21

...and down goes PhotoBucket with the new Terms of Service... I predict they will be out of business or begging for forgiveness inside a month. 6/30/2017
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375727 12/18/19 02:42 AM
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Thanks everyone and happy holidays!

Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375861 12/18/19 11:53 AM
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361V Offline
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89 Octane “PER YAMAHA” (Mid grade). Why open it up to public opinion?

Last edited by 361V; 12/18/19 11:54 AM.
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375880 12/18/19 12:39 PM
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Douglas J Online Content
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I've been running 89 in mine for years


“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety."

Benjamin Franklin
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375946 12/18/19 01:42 PM
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I run 89 (Valero) in my '19 ZX250, which is close to the same empty weight as the FX21, with the ring free per the Yamaha manual. I typically get between 72-76 mph depending on water and wind conditions.


2019 Skeeter ZX250
Re: Yamaha 250 Sho fuel choice??? [Re: SkeeterB] #13375958 12/18/19 01:48 PM
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Originally Posted by SkeeterB
5880 rpms 65 mph full tourney load.


Pretty close to what I get in mine. I can touch 67 with a full tournament load in the right conditions. What prop are you running?

Personally I'm ok with the top speed but I hate the hole shot on my fx21 in the summer with a tournament load. Thinking about looking into a different prop during warmer weather. Just not something I know much about though.

Re: Yamaha 250 Sho fuel choice??? [Re: Douglas J] #13375972 12/18/19 02:00 PM
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Originally Posted by Douglas J
I've been running 89 in mine for years


roflmao

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