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Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

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Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Fri Jul 31, 2020 3:45 pm

I have a 2017 Custom Weld Shallow Water that had a 1997 Evinrude 225 Vindicator outboard with a 7 3/8 V6 jet on it.

This was always a temporary situation because it came with a Honda 115/80 Jet on it which I felt was grossly underpowered and I told them to get rid of it and put this old Vindicator on in its place. The problem was I could only find a used 7 3/8 jet pump for it. It tended to slip and cavitate on holeshot. It is also a pretty heavy boat at this point since I also have a 24 volt Ultrerra trolling motor and 3 bank charger, 9.9 kicker, Fish Fighter Columbia Anchor system and sliding rail system + gear..... so not only did it slip but it took forever to get on step. Oh and ungodly LOUD too.

Well the day is here.... I just put a deposit at Stevens Marine (Portland OR) for a 2021 Mercury 250 Pro XS V8 with a 7 7/8 jet. I go down to get it installed 2nd week of Aug.

Pretty excited.

I tell myself that going from 1 mpg to like 3.5 with no oil will pay for its self.
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Htnbuks » Fri Jul 31, 2020 4:06 pm

That thing is going to be a rocket ship!
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby baldwinkw » Sun Aug 02, 2020 1:28 pm

Let us know how she runs
I do not understand everything I know
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby eby8510 » Wed Aug 12, 2020 10:38 am

Any updates?
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Thu Aug 13, 2020 4:33 pm

eby8510 wrote:Any updates?


Update is the motor arrived at Stevens on Monday.... they are still waiting on the 7 7/8 V8 jet from Outboard Jets....its 3 weeks past their estimated arrival date. Stevens Marine actually had an order of these pumps months ago and this jet is part of that order. Current new order lead time is 16 weeks.

But no shipping info, or tracking numbers, or invoices, or new estimate, and they cant even be bothered answering the phone cause apparently Speciality Manufacturing Co (aka Outboard Jets) is notorious for being the biggest pain in the ass jankey operation ever.... this is like the 3rd dealer I have heard this exact story from lol.
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Tue Aug 25, 2020 6:00 pm

Well the jet finally arrived.... lol. They are putting it on now.

Tomorrow I drive from Boise to Portland to have it put on the boat.
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Htnbuks » Tue Aug 25, 2020 6:35 pm

I’m curious about your top end! My 225 Merc only pushes the XL 37!
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Tue Aug 25, 2020 7:50 pm

Htnbuks wrote:I’m curious about your top end! My 225 Merc only pushes the XL 37!


Which 225 MERC do you have ? V6 or V8? 2 stroke or 4? And which pump? 7 7/8 or 7 5/8?

I have a 225 V6 2.7L Evinrude Vindicator 2 stroke at the moment and it pushes me around 35-37 mph at 5600 rpms @ 3500 alt but it’s using a 7 3/8 pump.

Stevens Marine has YouTube videos of them testing out the new 7 7/8 jet for the new 2018 Mercury big blocks since they were the ones that helped develop it with OBJ. They have a 200 V6 on a 23’ Alumaweld with 4 people doing 40mph at 4990 rpms.

Wooldridge has test data of them using an older 250 V6 2 stroke Pro XS with a 7 7/8 impeller and getting 5700 rpms and 42 mph with an Alaskan Xl

My hope is with the Pro XS V8 having more torque, more real hp, and a much higher rpm range than the 200 V6, I can turn that 7 7/8 impeller like 5900 rpms and get 45-ish mph.


Troutt and Sons Boats over in Missouri have been putting the new Mercury 300 V8s with the 7 7/8 jet on their 20’ Aluminium flat bottom bass boats and getting 52 mph.

Stevens Marine and Troutt and Sons were the only places who had ANY chance at all of getting the jet pump sooner than 16 weeks.
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Htnbuks » Wed Aug 26, 2020 6:14 am

I have a new 225 6 cyl 4 stroke on my Wooly, 7 7/8 impeller, 5K rpms is 37mph. That’s two people and 30 gal of gas
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Wed Aug 26, 2020 11:51 am

Htnbuks wrote:I have a new 225 6 cyl 4 stroke on my Wooly, 7 7/8 impeller, 5K rpms is 37mph. That’s two people and 30 gal of gas


I can't lie.... I will be pretty disappointed if thats where I end up lol

I hope 25 more hp, more torque from the V8, and the higher rpm range from the Pro XS ecu settings will get me over 5k.

Although I read online that people have dyno-ed the new 250 pro xs at 305 hp.

If not I spent a bunch more money than I could have lol

I'll let you know asap...
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Thu Aug 27, 2020 11:39 am

Install
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Htnbuks » Thu Aug 27, 2020 1:40 pm

Did they put a dual cable throttle box on yours too? One shift cable coming from engine control box to silver box and has 2 cables coming out??
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Thu Aug 27, 2020 8:13 pm

Htnbuks wrote:I’m curious about your top end! My 225 Merc only pushes the XL 37!


So here are some 2 hour break in info for you....

5950 rpms @ 45.7 mph 2 people 15 gals gas

The best part.... Cruising ON PLANE at 3750 rpms @ 26.9 mph getting 4.7 mpg for a range of 190 miles while being able to hold a conversation without shouting. Instead of cruising at 4500 rpms at 26 mhp getting 1.2 mpg and a range of 50 miles while going deaf
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Htnbuks » Fri Aug 28, 2020 9:00 am

Do you towing with your top up??
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Fri Aug 28, 2020 9:41 am

Htnbuks wrote:Do you towing with your top up??


I never take the top down. In fact I've talked to Custom Weld about putting a welded partial hard top with accessory tower and lights on it... $4k

But I tow with a cover on it. Everytime I tow it without the cover I get rock chips in the windshields.
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby waylon » Fri Aug 28, 2020 8:14 pm

Pimp! :Drink:
"Only God knows why"
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby prd » Tue Sep 15, 2020 9:05 pm

Your numbers are pretty amazing. How does this big OBjet compare to a 9" inboard pump when it comes to hauling a real load.

I've only had experience with light boats with 60/40s and you gotta go gas and packsack light.

But my Hamilton doesn't care what weight you put in there the numbers are barely different. Maybe 200rpm more for a really heavy load
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby Captainvette » Thu Sep 17, 2020 12:18 am

prd wrote:Your numbers are pretty amazing. How does this big OBjet compare to a 9" inboard pump when it comes to hauling a real load.

I've only had experience with light boats with 60/40s and you gotta go gas and packsack light.

But my Hamilton doesn't care what weight you put in there the numbers are barely different. Maybe 200rpm more for a really heavy load


I have no idea... i have never owned an inboard jet.

This boat is pretty heavy for its type though. Thats why I wanted the 7 7/8 jet.

It has a 24v Ultrerra trolling motor with 2 group 31 batteries,more batteries in the back for starting and electronics, onboard battery charger. 9.9 kicker and gas tank. Fish Fighter Columbia Anchor system and their sliding rail system with 6 rod holders. 2 downriggers with 10lbs balls All the wiring and network switch needed to run 2 Helix and the iPilot link motor.

When I'm not fishing for steelhead this boat doubles as a bass boat and mobile duck blind.

So this boat is always heavy.

I'm actually up in Lewiston Idaho right now and I went into Custom Weld today because I'm getting more spray than I used to so I wanted them to take a look. They want to raise the motor 1 possibly 2 holes to get it further under the tunnel and run it. They say it will get rid of the spray and maybe give me 3-5 more mph. That could put this boat at 48-50 mph.

I'd put that against a big inboard jet.... not in mega white water though lol
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby MT sauger skiff » Thu Sep 17, 2020 8:35 am

"I'm actually up in Lewiston Idaho right now and I went into Custom Weld today because I'm getting more spray than I used to so I wanted them to take a look. They want to raise the motor 1 possibly 2 holes to get it further under the tunnel and run it. They say it will get rid of the spray and maybe give me 3-5 more mph. That could put this boat at 48-50 mph."

Unrealistic to say the least.

They should have accounted for the adapter plate when they hung it, meaning up 1 hole from your old setup before it left the first time.

The tunnel extension is too long.

The running characteristics of the hull have now changed. If so, wheel corrections to compensate change intake orientation relative to hull and it will spray.

3 to 5...NO
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Re: Just Repowered Custom Weld Shallow Water - 250 Pro XS V8

Postby prd » Thu Sep 17, 2020 9:04 am

I would highly doubt that an outboard would match a big inboard. A guy here was hauling 7 full drums of fuel, plus 15 gerry cans, full fuel (60 gallons) in the tank and 2 guys and gear with 20 foot with a 6.2DI and hamilton.

If you could haul 4 drums I would be amazed.
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