Fire99
Well-known member
Evening People,
I've been looking at the differences between the 2.5 and 3.3hp 2-stroke Mariner/Mercury/Tohatsu outboards.
Forgetting the gears aspect and purely the powerhead, they are identical bore/stroke and after going through the workshop manual, they even use the same jet / needle in the carb.
So how does the 3.3 gain it's 0.8hp extra? Does anyone know the definitive answer to where the restriction is in the 2.5?
It's not engine capacity, carb, needle or jet. Anyone know the answer?
cheers,
Nick
I've been looking at the differences between the 2.5 and 3.3hp 2-stroke Mariner/Mercury/Tohatsu outboards.
Forgetting the gears aspect and purely the powerhead, they are identical bore/stroke and after going through the workshop manual, they even use the same jet / needle in the carb.
So how does the 3.3 gain it's 0.8hp extra? Does anyone know the definitive answer to where the restriction is in the 2.5?
It's not engine capacity, carb, needle or jet. Anyone know the answer?
cheers,
Nick