pro max vs fishing motor

[Ajskennels]

what exactly is the difference between a late model 200 EFI fishing motor and a 225 pro max besides the reed configuration, exhaust holes ( bottom of block) and ecu? i have read lots to threads and get mixed answers

[90 5.0]

Solid motor mounts
bigger exhaust dumps in adapter plate
tumer
7 peddle reed configuration
bigger exhaust chest
exhaust divider plate
ecu
bigger behind the liner ports
etc
Steel cage hp rod bearings
thinner piston rings
they are very similar but not the same. But a promax is a very dependable fishing motor also, best mix of hi po/dependably and longevity IMO.

[johnmiffco]

1996 -2000
200 and pro max 225 head gasket blocks
are the same blocks/porting in the cyls
only difference in block is the ex outlet at the tuner is rectangle instead of square
the sleeve replacement p#s are the same,,,,so same porting
same ex cavity just larger outlet
rest listed above is the differences

[TEXAS20225]

they also have rod slots in the 225 pmax there is no difference behind the liner at all ive looked at lots of them, the champer on the promax porting give more Height john is absolutely correct sleeves are the exact same prt number exhaust chest is the exact same, exhaust divider just has capacity to mount coils on it same other wise, i too like promax motors i have two that are mine now(but 12 over the years) but im a whore so everything is for sale i just got a steel sleeve 260 from james last week i assembled it today but i have had lots of 260s and a couple 280s and one one 300x (not again)promax is my all time favorite mota there is a guy on site named Tony (TUX 974) who builds best damn pmaxs i ever saw mint and all is Good,no junk this guy shoulda been a watch builder Sorry Tony:cheers:

[masonadaddoo]

What about the 225x vs. the newer 200's up to 2005. Are the differences the same as above?

[whipper]

225X is a O ring head gasket motor with to many differences to list in that comparison. 225X is a great motor just not so easy to mod compared to the 225pm.

[masonadaddoo]

Thanks for your answer. I've wondered what could be done I have a 2005 200 efi on my bullet great little motor. Runs good but would like to have a higher limiter. Who do you guys suggest to do this, and how high can I go with the oil injection, it has the new opti style injection. Nothing crazy on rpm just maybe 62-6400 rpm just to make it easier to prop. I fish 99% of the time has been a great little motor.

[XstreamVking]

Not what you want to hear, but leave it alone. Already a strong 200+ hp and a
few more r's is not gonna make much difference..... If you want to mod one and spin it up, get an older motor w/o all the pcm stuff on it.

[jmadisonbiii]

i just got a steel sleeve 260 from james last week i assembled it today but i have had lots of 260s and a couple 280s and one one 300x (not again)promax is my all time favorite mota

How much does a ProMax 225 give up to a steel sleeve 260, in your opinion?

[TEXAS20225]

this is my second steel sleeve 260 the first was a machine shop bust it ran up to 6500 and hit the anchor out switch came on i ant sure since this one is not water ready yet

[jmadisonbiii]

OK thanks that's something I've been curious about, I'll check back with you and see how it does.

[90 5.0]

According to research I've seen in an identical port motor nic makes 12 more hp than steel sleeve motor above 8k due to parasitic drag.

[jmadisonbiii]

So if a stock ProMax is 240-245 then it should be closer to a steel sleeved 260 or no?

[JCSmile]

A stock 260 is more than 260 too. I'm guessing a well done steel sleeve with stock 260 ports will still have more pep than a stock promax. It would be closer though. The promax might have the holeshot with the laser front half.

[whipper]

My guess is a 260 steel sleeve will eat a 225 promax for breakfast. It would cost alot of money in mods to get a 225 to even just 260hp. There comes a point were a lightened 300pm looks like the better option. Those motors on a diet get very close to 400lbs with different mids and light cowls and junk taken away. Promax 225 is a strong motor for what it is but no wear near not even close to a 260/280/S3000 performance. But the promax is the best compromise for longevity, reliability, and performance in my opinion. Texans 260 steel bore sounds very interesting. Not to many of those around but there have been a few. You can port a 225 pm to 260 spec as a popular mod for more jam but then again at that point may as well just start with a 260 add SVS and acu and youll have a potent setup. Still wont beat a stock 260 but youll be getting closer.:D wont even get into the charging differences. Another pluss for the 225 but there kits for the 260 if your intended use is fishing.

Bottom line AJ is if you want more rpm or power sell your 200 and youll probably make enough to replace it with a 96-2000 fresh 225 or 260. Be darn close anyway. 6000-7000 get you a nice example of either. Better yet 250 or 300xs for fishing. More and more of them 9000 or less with under 250 hrs. they should be like the promax and get close to 1000 hrs out of them before a rebuild. Theirs lots of 225 promaxs with over 1500 hrs on fishing boats. Im on year 11 since a freshen up and still runs strong to 7500 rpm..

[johnmiffco]

yes merc did release in 91/92 a steel 260 block on carbs
was sold as a mod vp motor
was a screamer,,,,,,i had 1 and loved it

[Ajskennels]

whipper, i run a 225x, well as soon as the block comes back from the sleeve shop i will be again, i was just asking this because i have a 200 block i wanted to play with, i compaired my block to a friend of mines 98 225 pro max and only difference i found in the block was the exhaust holes in the bottom of the block and the front half, all ports are the same and the exhaust chest is identical, i have access to a a17 computer and a 7 petal front half for a reasonable price just wondering if there is some behind the liner differences i can't see

[ssv1761982]

What happened to the 225x?

[johnboy 88 vegas]

Went the way of the dinosaurs probably because of part compatibility.

[Ajskennels]

Not real sure, Either the injectors failed or ecu failed but smoked #5&6, they was both dry when we broke it down, im thinking it was the ecu, when i get it back im converting it to cdi ignition and brand new injectors

[texasvector]

1996 -2000
200 and pro max 225 head gasket blocks
are the same blocks/porting in the cyls
only difference in block is the ex outlet at the tuner is rectangle instead of square
the sleeve replacement p#s are the same,,,,so same porting
same ex cavity just larger outlet
rest listed above is the differences

:iagree:

yep^^^^ + rod slots like mentioned earlier

[Ajskennels]

i also wanted to know if anybody could tell me whats so special about 2.5 liter FF blocks?, sorry if i sound dumb, I'm new to the modifications thing but I'm always being asked if i got any FF blocks laying around and i never bothered to see what all the fuss was about until now

[texasvector]

believe its the behind the liner porting ......when i compared the 2 side by side ...it was a FF block and 225 pm block

maybe there's more to it......

[Ajskennels]

the 200 block I'm wanting to play with happens to be a ff block, i did compare it to my friends promax and i couldn't see or measure any difference except the exhaust holes on the bottom of the block, if the behind the liner porting is the same would it be a safe assumption that if i put a 7 petal front on it, cut the bottom exhaust holes, and put a a17 computer on it then it would be a 225

[texasvector]

rod slots...........

[Ajskennels]

this is my slots, I'm not sure i know what you guys are talking about when you say "rod slots" educate me please

357969

[texasvector]

this is not factory but only pic i could find quick.....see outer edge of slot cut back behind liner

http://i68.tinypic.com/29o6h78.jpg

[Ajskennels]

ahh, gotcha, anybody know the X,Y,Z numbers for a stock promax, i can cut those

[whipper]

Yes pretty sure most of the 2.5 blocks are all the same except how there finished. i have no idea about the xyz,s but i know there are a lot of guys who do that will chime in. There has been some articles on this as well that you might be able to still find were guys did what your asking if i recall correctly. I envy you guys that can tear into these motors . I haven't had to {yet} so only know basics and some differences. Ill try and find that article i read. B&W had an excellent series were they made a promax build to around 300 hp a long time ago that was a very informative 2 or 3 part and they discuss chest work extra..