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Background: I have a 1979 70hp evindrude 3 cyl 2-stroke on my 1979 16 foot lund (runabout I converted to fishing craft). &0 is the max rated HP. Question: Typically how much more does a 70 HP 4-stroke weigh than a 70 hp two stroke? If I upgrade to a four, will this be too heavy? The boat does not ride particularly high as it is.

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The rating is for power not for weight. My understanding is the even the new 2 strokes weigh more than the older 2 strokes. I know that i am answering this in a round about way, but most of those older runabouts also came equiped with an inboard outboard and those thing definetely outweighed the present 4 stroke outboards.

One way to get an idea of if the thing would sit to low is have some sit at the back of the boat and see what you think. I am only guessing but I think the difference would be somewhere between 100 and 200 pounds.

Or you could post this on iboats.com, they have some real boating gurus out there.

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I have a 1998 Lund Mr. Pike 1650 hull. I have a 1998 Johnson 70HP 4-stroker on it. The Johnson is actually a Suzuki with Johnson casing. Anyway, this motor weighs in at a whopping 325 pounds.
It is a bit on the heavy end yes, but it IS a SWEET running motor and ALWAYS starts on the very 1st turn of the key...cold or warmed-up!
It tops out @ 5400rpm doing 38mph using the stock prop, with just me in it.

Good Luck!

"LUND-MAN"

------------------
"Leave NO Trace"

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