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08-22-2015, 06:42 AM #16Screaming And Flying!
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I went back and forth through the same rodeo and did a lot of research along the way. I found that for 90% of us, and the way we run our boats "non-race" that the one piece adapter and washers is annoying at best. I finally went to a 2 piece adapter, thermostats, and poppet on my 15" and (knock on fiberglass) have had zero problems this year. It's actually been a unique experience to have the dang motor just run and run. Never could get the cooling to work properly for two years prior.
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KIRCHNER thanked for this post
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08-22-2015, 03:29 PM #17
I concluded the same thing. If you don't need the one piece adapter to use wing plates for steering purposes you are better off using the 2 pc setup.
Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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08-23-2015, 06:27 AM #18
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08-23-2015, 10:33 AM #19Screaming And Flying!
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When I was trying to get my problem solved, I communicated with two additional folks who also had factory Promax 225 SS motors that came stock with one piece adapters, 120 degree thermostats and poppet valve for idling. All 100% factory. One guy actually had bought his motor brand new and still had it. Just a couple more data points as there are VERY few factory SS motors out there.
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11-02-2015, 10:20 PM #20Screaming And Flying!
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Dragging it back to the top to continue the report.............
The 2 piece adapter has run very well for the two months since the last post. Idles well with the 120 degree t-stats and settles at 123-125. The minute I stab the throttle and come onto plane the temp drops very quickly as one would expect. Once up at 4000 RPM cruise the temp on the SCM 1000 gauge drops to 96 degree and even at WOT never goes beyond 102. Far colder than I'd like, but the senders are low on both banks so they are reading actual water temp. Has run like a clock with the 2 piece. I have given a fleeting thought to doing something to get the temps higher but then I realize I'm not sure what I would do to achieve this? Smokes a little more than I'd expect for the first 5 minutes or so burning Pennzoil exclusively.
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11-03-2015, 05:41 AM #21
If you are dropping temps that fast when up on plane you better off running the 143 stats. Steel sleeve motors need some heat. Your additional smoke is probably coming from the ECU telling is cold need to rich en up....JM2cents
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11-03-2015, 08:15 AM #22Supporting Vendor
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OK guys just rub it in....!!!! I am assuming the triangle opening in the two piece adapter shown is the missing chamber in the one piece plate that was discussed in the 225X? That chamber vents to the can instead of just being part of the water flow "loop" so the poppet does not have pressure equalized on each side.
Dave Hensley
1986 XR2002 /12" Mariner and string steering
18' Pugh Hydro
1992 XTB-21/225 ProMax
The barn is emptying out!!!
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11-03-2015, 09:29 AM #23
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11-03-2015, 09:43 AM #24Screaming And Flying!
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Appreciate this thread as I have a newly built 225 Pro Max, this thing had stupid water pressure, 45 PSI and above :O but now the thermostats and the popet have been removed, running fender washers. Am I just asking for problems down the road? Water pressure now is right where it should be, and I have 5 or 6 trips this year with no problems, but is it making enough heat ? I don't know.
God, Country, and Fast Boats
SPECIAL BOAT TEAM 12/ HSB'S SOC NSWU-1
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Live your life that the fear of death can never enter your heart. And when your time comes to die, be not like those whose hearts are filled with fear of death, so that they weep and pray for more time that they may live there life over in a different way. Sing your death song, and die like a Hero going home.
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11-03-2015, 10:08 AM #25
A 225 PROMAX on a factory promax 2 pc adapter with poppet and thermos has 3-5 PSI PSI at idles and ~ 15 PSI at WOT. I have two and they are both about the same and run very good with no temperature issues. These are 225 Promax engines.... NOT 225X motors. Don't want mix apples and oranges.
Dave, your observation on the open chamber resulting in no differential pressure across the poppet is correct for the one pc adapter. That's why the poppet is non functional with the one pc adapter.Go Time
2003XS GS 225 Promax/ 260 / 280
26 Regulator twin 250 EFI
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11-03-2015, 10:20 AM #26Screaming And Flying!
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I'd be looking for an obstruction of some sort with that type of crazy high pressure. Assuming you are a regular boater and not racing the thing, my .02 is go back to "poppet and stats" and find the obstruction. As has been said in the earlier post, the motors like heat and you are in colder waters to begin with. Of course the water pressure gauge could always be wacky but I suspect you checked that already.
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11-03-2015, 10:26 AM #27Screaming And Flying!
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Correct, the gauge was the first thing I checked. Going back to poppet and stats this winter. No boat is not raced, just fun up and down the river.
God, Country, and Fast Boats
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Live your life that the fear of death can never enter your heart. And when your time comes to die, be not like those whose hearts are filled with fear of death, so that they weep and pray for more time that they may live there life over in a different way. Sing your death song, and die like a Hero going home.
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12-03-2016, 09:01 AM #28Screaming And Flying!
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12-03-2016, 09:03 AM #29Screaming And Flying!
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12-03-2016, 09:25 AM #30
has anyone actually compared a "real pro max" one piece ta any other one piece???.. don't think merc would add a poppet that does nothin'.... unless you actually took tha 15" motor outta tha box then what ya have or what you've seen don't count!