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  REVENGE 25 W-T, Notched Transom, Twin 150 OptiMax

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Author Topic:   REVENGE 25 W-T, Notched Transom, Twin 150 OptiMax
Iron river posted 06-16-2014 11:47 AM ET (US)   Profile for Iron river   Send Email to Iron river  
I just bought a REVENGE 25 W-T with notched transom, and so far I love the boat. My first trip was 120 miles home in four-foot seas; it handled like a champ.

The previous owner has installed the wrong propellers: 21-pitch Quicksilver stainless. The engines only pull 4,950-RPM with 120 gallons of fuel and two guys on board. I have been looking at the ENERTIA and MIRAGEplus in a 19-pitch. I do not have a dealer near by that will let me test, so I am looking for some one with a similar package to provide some guidance.

Right now, the boat speed is only 35.5-nautical-miles-per-hour trimmed just right at WOT. I see others post with this set up nearly 50-statute-miles-per-hour. Also at 27-nautical-miles-per-hour cruise at 4,100-RPM I am burning [over] 18-GPH. The hull has been [unclear] and has a small amount of growth but nothing major. I had it surveyed out of the water and the hull looks to be in perfect condition. I would love to see some data on other similar packages before I purchase $1,200 worth of propellers just to be disappointed.

I was hunting for a Grady at the time of purchase and this site converted me I am happy with my choice it fits my application perfect. Thanks in advance for the support.

jimh posted 06-17-2014 10:14 AM ET (US)     Profile for jimh  Send Email to jimh     
Congratulations on the REVENGE 25 W-T. The REVENGE style boats are the favorite of many knowledgeable Boston Whaler enthusiast, and a REVENGE is probably perfect for your boating area in the Vancouver Island area. (By the way, I spent almost two weeks boating in your local waters back in 2003 in my REVENGE.)

I caution you to not underestimate the speed reduction caused by marine growth on the hull. It may be prudent to get the hull cleaned of any aquatic growth before going ahead with propeller testing.

I think Tom Clark has just about the identical set-up on his Revenge 25 with twin 150-HP Mercury two-sroke engines. He should be able to give excellent advice on propeller selection.

Since the engines may have been running with a bit too much propeller, they may need some attention, too. If the engines have been lugging, they may have some soot and carbon deposits. It may be prudent to use a fuel additive like Mercury QUICKLEEN, perhaps in a strong concentration, in the next tank of gasoline.

Iron river posted 06-17-2014 01:18 PM ET (US)     Profile for Iron river  Send Email to Iron river     
Thanks I will pull the boat this week and wash the hull. The local prop shop has agreed to let me try a solas lexor 19p when he gets his shipment but still no luck on any of the merc props. I am looking forward to a reply from Tom as I have been reading his posts. I will diffidently pay some attention to the motors thanks for the tip.
Jeff posted 06-19-2014 11:40 PM ET (US)     Profile for Jeff  Send Email to Jeff     
Jim McPadden (username: Jamesmylesmcp) has a 1986 25 Revenge Walkaround with twin counter rotating 150 Optimax. He has dialed it in well and could provide you with good first hand knowledge as well. Do some digging in the performance section here and you might find his thread of prop testing and engine mounting height specs. I believe he is able to run high 40's to around 50 WOT.

http://i185.photobucket.com/albums/x44/ribside/opt.jpg

Teak Oil posted 06-20-2014 12:49 PM ET (US)     Profile for Teak Oil  Send Email to Teak Oil     
Tom has 2.0 liter motors and the Opti is a 2.5 liter so you should also be close to 50 mph at WOT. Tom has tried just about every prop out there so he should be able to help.

Get the bottom clean and tell us what bolt hole your engines are mounted in. If they are all the way down they are too low and need to be raised.

russellbailey posted 06-20-2014 05:56 PM ET (US)     Profile for russellbailey  Send Email to russellbailey     
My 1984 Outrage 25 with 2006 Optimax 150s uses 17p Rev4 propellers which seem to work well on it. Right at 50 mph.

The prior owner tested a number of props and felt these were the best for it.

jamesmylesmcp posted 06-20-2014 09:39 PM ET (US)     Profile for jamesmylesmcp  Send Email to jamesmylesmcp     
My boat has twin 2007 Mercury Optimax 150hp ( counter rotating ) with 19p Mercury Mirage Plus props. Cruise at 30 MPH burning 5 gallons an hour per engine, she will run 50MPH.

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