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#1
10-02-2017, 09:58 PM
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My little brother has an '88 18SF, from an old OMC 112, to a rebuilt OMC 150, and finally a Zuke 140 he runs full throttle A lot! Great motor but I like my two strokes on the transom. What is the weight of an E-tec 175 and shaft length? My '79 20 MA loves its '99 Johnson carbed 175. And so does the fuel station.
Pick your battles... Cheers Vezo, Part II 
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#3
10-04-2017, 09:49 AM
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Right around 400lbs (+/-) seems to be about the max weight (25" transom) without major modifications and weight shifting. Add a bracket to the 20 and the LCG gets all out of whack, so you end up having to move weight forward (batteries/fuel tank/ballast).
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#4
10-05-2017, 10:33 AM
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Weight and CG Effects
Bigshripmpin & others-
Hey Tim- You usually are a good voice of reason on CSC. I wanted to alert you to this in case you had not seen it From time to time I try to tell folks of my post on "estimating CG shift with heavy engines". I put together an example of a relatively simple way to estimate the shift in CG due to heavier engines, outboard brackets, etc. If one were to use this when a change is contemplated then they can actually test the results with water filled coolers or weights before spending money and modifying their SeaCcrafts. Try searching on "estimating cg" Post#1 on page 3 of 3, dated 9-24-16.
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#5
10-05-2017, 11:24 AM
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I second Fishstretcher and Bigshrimpin - with my 115hp motor, I am running at 3/4 throttle most of the time, because it will launch my light Seafari hull off the wave tops. And the hull likes weight in the bow - so go lighter motor: the 140 should be great for the 20 foot hull.
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