2007-06-11 05:24:41 · 9 answers · asked by wells_moonwalk 1 in Cars & Transportation ➔ Boats & Boating
Shel's got it right! Higher octone fuel is better than lower octane fuels in that with higher octane, the ignition is delayed until the spark fires.
Lower-octane fuels are likely to experience pre-ignition, and this hurts the performance of the engine since pre-ignition tends to work AGAINST the engine.
2007-06-11 05:31:19 · answer #1 · answered by ? 6 · 0⤊ 0⤋
Octane is a flash suppressant, it raises the temperature of which the gasoline combusts.
the two main reasons you need the temperature raised is:
heat of compression: when the piston goes up it compresses the air/fuel mixture in the cyclinder, when a fluid (air) is compressed is generates heat. (how a diesel works). if the combustion temperature is reached before piston hits the top of the stroke (tdc) then the combustion will slow the piston.
carbon build up: excessive carbon (usually caused by bad rings) will cause heat to be retained in the cyclinder. This heat can cause combustion of low octane fuel.
if you got a clean low compression engine, the octane either will not cause a preformance increase, or will cause a very slight loss due to more non power producing crap in the gas.
2007-06-11 07:29:57 · answer #2 · answered by Neal 3 · 0⤊ 0⤋
The purpose of higher octane gasoline is to reduce ping and knocking in higher compression engines, thus getting maximum performance from these engines. If you don't have the engine, the gasoline won't make a difference.
2007-06-11 05:30:18 · answer #3 · answered by Mike1942f 7 · 0⤊ 0⤋
Marine gas is 87+ octane so if you use pump gas as the gas station do not use Under 87 octane. Higher octane is used in high performance engine only.
2007-06-13 09:13:18 · answer #4 · answered by Anonymous · 0⤊ 0⤋
All marine engines used in pleasure craft(not high performance)use 87 octane.There are lots of things that you can safely do with out potentially harming the the engine with higher octane fuel
2007-06-11 05:37:11 · answer #5 · answered by singer 3 · 0⤊ 0⤋
No, it will only reduce the "ping" if you have one. You most likely have a normal compression ratio( the mount of fuel to air that gets compressed when the piston goes thru its normal travel) Extra octane does not "clean" and engine nor does it help in any way if your engine is not designed to burn it. Consult your boat engine's manual to see what octane you should be using.
2007-06-11 05:31:04 · answer #6 · answered by butterflykisses427 5 · 0⤊ 0⤋
The guy who said that the difference between a 275 and 300 verado is close, except Mercury doesn't make a 300hp Verado. The biggest they make is a 275hp. Anyway, he is correct though that this specific engine can run on 87, but to achieve full HP you need to run premium fuel. It depends on the engine and the year of it to determine the benifits. Oh, my father has owned a Mercury dealership for over 35 years......
2007-06-12 10:58:09 · answer #7 · answered by Tony M 4 · 0⤊ 0⤋
Only if the engine is designed to run on premium fuel. If the engine runs on regular then extra octane won't do anything but empty your wallet faster.
2007-06-11 05:28:23 · answer #8 · answered by Anonymous · 1⤊ 0⤋
any of you guys know the only difference between a 275 and a 300 Verado is using premium fuel?
2007-06-11 06:41:33 · answer #9 · answered by Anonymous · 0⤊ 0⤋