Here's my custom 25ss with lower cowl and fishing motor cowls, yes that's right that's a 25ss tower under there.

The lower unit is a 1:1 ratio, I 3 blade props. It does 50mph easy , and with some slight adjustments my goal is 55mph, the boat is a bit heavier-longer then the original 25ss hydro, but safer.

Working on a 30h over the winter so be sure to check back for more updates, also a mod25 powerhead!
The "Before and After"
What the tower looked like when it came from Australia!
Cleaned the tower up pretty good....
For extra saftey we welded 1/4" aluminum 6061 plates onto the tower for more strength, since these towers were known to crack/fail.
The tower sits on a new swivel pin and tower bushings, and a forged reinforced clamp saddle.

Many thanks to JG's expert machining and help!!
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