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  Promax 300 or 300X for 25 Outrage

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Author Topic:   Promax 300 or 300X for 25 Outrage
Capt_Tidy posted 07-19-2002 07:15 PM ET (US)   Profile for Capt_Tidy   Send Email to Capt_Tidy  
Is anyone running a Promax 300 or 300x on a Outrage 25. It's one of the repower options we are considering with a 36 inch Stainless Marine setback.

lhg posted 07-19-2002 07:45 PM ET (US)     Profile for lhg    
I'd recommend more like 26" setback for the bracket. That's what I am using with twin 200 Mercury EFI's, 25" shaft length. Whaler used 36" setback on the 27' Whaler Drive.

The 300 HP Mercs are only available with 25" shaft length, which I would not recommend for a single on a transom bracket. The engine will get buried too often. It would be OK, however, mounted directly on the transom. You need a 30" engine when running a single at a 26-30" setback. The 250 EFI in 30" length may serve your needs OK.

Capt_Tidy posted 07-22-2002 02:06 PM ET (US)     Profile for Capt_Tidy  Send Email to Capt_Tidy     
Thanks for the advise. We just got this awesome 25 Outrage at a steal with the orginal 235 Johnson which runs perfect with 1,300+ hours. It was apparently garaged for a long long time. But ever hiccup makes me jump especially when 60 miles offshore. It's a long way back on the 10hp kicker.

After much research and a lot of endless reading of older posts, a newer single with good fuel economy and just enough punch to go sking is very desireable... plus I love the savings in captial costs with only one engine.

The Promax 300 and 300X don't appear to have the best rep for longevity as compared to the 225 or 250's. I've inquired about an extension but no word yet. The extra 50 horse would be nice at very little cost in weight. The extra 50 hp is pretty costly in terms of $$$.

Has anyone had any luck with a hyraulic setback? Although you would lose the flotation advantage (probably minimal under power) and the nice dive platform of most setbacks, a foot of vertical throw would seem like an very desireable trimming tool. It would wonderful to be properly trimed (vertically) at min reves, 1/2 throttle, and WTO.

Ian Goltz
Newport Beach, CA
(formally Skeleton Lake, Ontario)

lhg posted 07-22-2002 06:02 PM ET (US)     Profile for lhg    
Wonder if we're related. Ours used to be "von der Goltz" before being shortened at Ellis island in 1870.

I'm sure a CMC or other brand hydraulic jack would work well. Then you could use a 250 EFI or DFI, or even one of the 225 4-strokes now available. Although BW has shown a picture of a pair of 300's on a 27 Challenger patrol boat, I don't think a Mercury Racing "Darth Vader" high performance Merc 300 EFI is best for your application. They are mostly for the go-fasts. As a starter, those things require 91 Octane fuel.

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