MONSTERMATT
New Member
GOT A RXP-X and my marina only offers 87 octane and for best performance the manual says run 93, what do u guys think
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Octane
- Thread starter MONSTERMATT
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You need to run the higher octane to keep from detonation of the engine. It was designed to run on the higher octane fuel. You're better off getting fuel away from the marina anyway based on price. Marines charge like $.25 to $1.00 more per gallon anyway.
Karl
Karl
tomcat&family
New Member
If you can, I'd just buy a few gas cans and fuel up that way. Then you can get the high-octane fuel that you need. Just make sure to buy a funnel to aid in the fueling process. 
Octane.......
All 2-cycle skis/boats use 87 octane. The 4-TEC is the only engine using the 91 or greater................The minimum requirements on fuel in the 1503 is 87 octane, (ron + mon) 2 with a use no greater than 91. In lower altitudes, I'd recommend that you stick with the 87 octane, but if your in the mile high city of Colorado, I'd go with the higher grade octane of 91, since it burns hotter with less oxygen.
Outside the U.S., the recommended requirments call for 91 octane in naturally aspirated engines... RON (why? U.S. emission controls). The super charged or SCIC engines call for a minimum requirement in the U.S. of 91 and outside 95 or RON.
Sorry for the confusion, I was answering this post from work when my boss walked in.
Bottom line, 2 cycles 87, .........4 strokes, no less than 87, no greater than 91. The manual gives you a choice by recommending one grade but states no greater than another.
Using selected grades by altitude is normally noticed where you live. If your local gas station sells 91 or 89 octane, then the 87 is not feasible to use at your altitude.........so, a little of the decision of which type fuel to use is left up to the owner.
The required spark plugs, that generate the heat for combustion is the most important part of this equation. If you burn a higher octane of fuel, do not change to a hotter plug. You will burn a hole in your piston..........
All 2-cycle skis/boats use 87 octane. The 4-TEC is the only engine using the 91 or greater................The minimum requirements on fuel in the 1503 is 87 octane, (ron + mon) 2 with a use no greater than 91. In lower altitudes, I'd recommend that you stick with the 87 octane, but if your in the mile high city of Colorado, I'd go with the higher grade octane of 91, since it burns hotter with less oxygen.
Outside the U.S., the recommended requirments call for 91 octane in naturally aspirated engines... RON (why? U.S. emission controls). The super charged or SCIC engines call for a minimum requirement in the U.S. of 91 and outside 95 or RON.
Sorry for the confusion, I was answering this post from work when my boss walked in.
Bottom line, 2 cycles 87, .........4 strokes, no less than 87, no greater than 91. The manual gives you a choice by recommending one grade but states no greater than another.
Using selected grades by altitude is normally noticed where you live. If your local gas station sells 91 or 89 octane, then the 87 is not feasible to use at your altitude.........so, a little of the decision of which type fuel to use is left up to the owner.
The required spark plugs, that generate the heat for combustion is the most important part of this equation. If you burn a higher octane of fuel, do not change to a hotter plug. You will burn a hole in your piston..........
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Actually to complete that statement seadoosnipe...only Super Charged 4-TEC use 91 octane. The naturally aspirated use 87 octane.
Karl:cheers:
Karl:cheers:
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