Quote:
Originally Posted by Sparehead
. . . but let me ask one more question you’re all likely to have experienced opinions on. Assuming I hang a relatively heavy modern 150 on the transom and relocate the battery/s forward and under the deck, and assuming I build a fiberglass splashwell around the transom cut that comes close to the rear gunnel height, other than saving a little weight is there any advantage to going with a 20” outboard over a 25”? I understand the 25” has the advantage of having the powerhead further above the water and will be less like to suffer water intrusion from launching from a steep ramp. As I’ve dropped the bracket from my plan I’m not sure how big these advantages are now or if there’s anything else I’m overlooking.
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As for the weight difference between short and long shaft motors, I've seen anywhere from 8 to 15 lbs difference quoted on the E-TEC's, which I think would be easily offset by moving batteries forward. However some motors, such as the 115 E-TEC, use a significantly different gear reduction on the longer shaft version, like 2.25:1 instead of 2.0:1, so that would be something to check out on whatever motor you select. (Be sure you use wet weights when comparing motors, because 6 qts. of crankcase + gear oil adds another 11 lbs or so to the weight of a 4S motor!)
I know Capt. Terry stayed with a 20" motor when he repowered his Seafari and seemed a little concerned about the loss of freeboard at the transom, but he didn't move any batteries.
Regarding dunking the powerhead when launching from a steep ramp, I assume you're talking about a roller trailer like mine with minimal friction in the roller system. If you have a roller trailer, I'd strongly recommend using a PowerWinch on it, and you can use the winch clutch to control how fast it comes off the trailer. I normally just back the trailer in enough to get the tires wet, so water is shallow enough close to the trailer that I'm more concerned about boat hitting the ramp if it comes off too fast, but I've always been able to control it with the winch. I previously had a 2-speed Fulton manual winch that could free-spool, but it also had a brake on it that was very useful!