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1. www.thehulltruth.com › boating-forum › 440175-bestBest Octane Gas for Yamaha 4-Strokes? - The Hull Truth ...

   www.thehulltruth.com › boating-forum › 440175-best

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   Jul 12, 2012 · If I can do that for a car, then why not do it for a boat engine that costs as much as a whole car does and that your life quite literally could be dependent on. Yeah, I'll pay for the good stuff and work hard to find somewhere that sells Non-Ethanol fuel.

2. forums.iboats.com › threads › what-octane-gas-isWhat octane gas is best to use for a two stroke outboard ...

   forums.iboats.com › threads › what-octane-gas-is

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   Jan 6, 2012 · Re: What octane gas is best to use for a two stroke outboard motor. In the US (I have no idea about Peru) the additive package is the same for all octane ratings, all you get is a higher octane, which is of no value in an outboard unless the manual states otherwise (which it does on a few motors).

3. forums.iboats.com › threads › can-you-add-octainCan you add Octain Booster to fuel on a outboard motor

   forums.iboats.com › threads › can-you-add-octain

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   Oct 18, 2005 · Yeah, you need to run the lowest octane your motor was designed for - that's 87 for most outboards. The crap in the tiny little bottle that says octane booster at most parts stores is completely worthless in anything. You need to add GALLONS of liquid to bring up the octane any noticeable amount.

4. www.mercurymarine.com › us › enFourstroke 250-300hp Outboard Motor | Mercury Marine

   www.mercurymarine.com › us › en

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   It simplifies boat operation while improving engine performance and decreasing fuel costs. Active Trim is compatible with all current SmartCraft-capable Mercury outboards (2004 and newer, 40hp and above; 2022 and newer, 25hp and above).

5. forums.iboats.com › threads › higher-octane-forHigher octane for outboards | Boating Forum - iboats Boating ...

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   Oct 9, 2010 · Running low octane fuel in an outboard that is set for high octane would result in engine damage if the ECU was unable to detect detonation. All the new outboards I've seen come from the factory with 87 octane fuel requirements.

6. www.boats.com › reviews › hondas-new-v8-bf350Honda's New V8 BF350, Biggest Outboard Engine To Date

   www.boats.com › reviews › hondas-new-v8-bf350

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   Oct 19, 2023 · One of the notable features of the BF350 is its fuel efficiency—while several 350 hp engines necessitate 91 octane, this engine efficiently operates on just 86 octane, providing a more economical option for owners at fuel stations.

7. People also ask

   Can you run low octane fuel in an outboard?

   • Running low octane fuel in an outboard that is set for high octane would result in engine damage if the ECU was unable to detect detonation. All the new outboards I've seen come from the factory with 87 octane fuel requirements. It's possible you could have the timing maps updated by a dealer to allow more advanced ignition timing.

   Higher octane for outboards - iboats Boating Forums

   forums.iboats.com/threads/higher-octane-for-outboards.433082/

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   What octane gas is best for a two stroke outboard motor?

   • Bottom line: Use the cheapest gasoline you can find at 87 octane and the cheapest TCW-3 oil. Re: What octane gas is best to use for a two stroke outboard motor. You Know: We could go on and on ad infinitum (can you spell redundant?) about the merits or lack thereof of various octane and brands of gasoline and additives.

   What octane gas is best to use for a two stroke outboard motor

   forums.iboats.com/threads/what-octane-gas-is-best-to-use-for-a-two-stroke-outboard-motor.512558/

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   Does outboard gas increase octane?

   • Does it increase octane, yes; do you need to increase your octane, no. Most outboards are designed to use 87 octane you don't need better. Will it make old stale gas better, no; once gas has gone bad the only real use for it is starting a bonfire. You are throwing your money away buy trying to doctor up old gas.

   Higher octane for outboards - iboats Boating Forums

   forums.iboats.com/threads/higher-octane-for-outboards.433082/

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   How much Octane does a bf350 engine use?

   • One of the notable features of the BF350 is its fuel efficiency—while several 350 hp engines necessitate 91 octane, this engine efficiently operates on just 86 octane, providing a more economical option for owners at fuel stations. Above: Honda BF350 V8 Outboard Engine. Photo by Honda Marine.

   Honda's New V8 BF350, Biggest Outboard Engine To Date

   www.boats.com/reviews/hondas-new-v8-bf350-biggest-outboard-engine-to-date/

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8. yamahaoutboards.com › outboards › 350-150-hp300-225 HP V6 4.2L Outboard Motors - Yamaha Outboards

   yamahaoutboards.com › outboards › 350-150-hp

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   Recommended fuel: 87 Octane; Shaft lengths available: 25”, 30”, and 35" (30" and 35" on F250 DEC only) Alternator output: Up to 70 amp *Mechanical F225, F250, and F300 models remain unchanged and are available in gray only.