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2 stroke v 4 stroke

  • 29-08-2010 08:01PM
    #1
    coolvale
    Registered Users, Registered Users 2 Posts: 217 ✭✭


    hi would a 4 stroke outboard be much more lighter on petrol than a 2 stroke ? whats for & against both engines.please.
    thanks all.


Comments

  • #2
    murphym7
    Registered Users, Registered Users 2 Posts: 2,036 ✭✭✭murphym7


    coolvale wrote: »
    hi would a 4 stroke outboard be much more lighter on petrol than a 2 stroke ? whats for & against both engines.please.
    thanks all.

    Simply put the 2 stroke, in theory, burns more fuel than the 4 stroke, this only become important with a big engine - you would not really notice on a small outboard. The 2 stroke does however give more punch per HP than the 4 stroke. The 2 strokes are lighter and have a better power to weight ratio (only really important on really big engines or very small boats)

    The 4 stroke, again in theory, should last longer as it has its own lubrication system unlike the 2 stoke that has a mixed petrol lubrication system. 4 strokes make less noise also.

    I am unsure though as to whether the manufacturers are permitted to make 2 strokes any more though (environmental reasons I think).

    Basically if I was buying a 2/3HP engine for my dingy/tender I would try and pick up a 2 stroke - if I was buying a 30/40 HP engine for a fishing boat I would go with a 4 stroke.


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