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Thread: 2.5 200 Block & Front Half
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11-15-2014, 07:18 PM #1
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2.5 200 Block & Front Half
I have a virgin/never fired all std. bore 91' Mercury 2.5 200 block with a low hour non-matching 5 petal front half. The story on this block from previous owner was used at a Mercury school. It had been assembled and reassembled a few times. I bought this off the board about 3 years ago with plans to build a prostock style 200. That has not happened so maybe someone can use it. I am asking $1000/o.b.o. plus shipping to lower 48 states. I have some other parts I can sell but not enough for complete motor. PM or call/text 817.688.6340. Thanks.
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11-16-2014, 03:58 PM #2
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doesn't this block have narrow transfer ports as well as small exhaust cavity ?? is this your firm price
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11-16-2014, 10:05 PM #3
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If it is a true 1991 is should have exhaust relief slots. I have had a couple of these. The ones I had also were bottom guided too.
93 xr 2001 drag with a 15" drag
92 xb 2002 comp with a 15" drag
R.I.P. Phil "rpm racing" Watch over the rest of us my friend.
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11-16-2014, 10:32 PM #4
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It is a true 91' XRI block without reliefs. I believe all the carb motors had the reliefs.
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11-18-2014, 09:52 AM #5
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I gotcha. I have never seen a 91 xri.
93 xr 2001 drag with a 15" drag
92 xb 2002 comp with a 15" drag
R.I.P. Phil "rpm racing" Watch over the rest of us my friend.
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11-18-2014, 10:13 AM #6
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yes carb were idle relief and efi were not
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11-18-2014, 03:44 PM #7
5000 RPM
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not true I had a 1991 EFI with relief slots and 7 peddle front
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11-18-2014, 05:09 PM #8
5000 RPM
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from 1991-93
mercury did a lot of mismatched stuff on the new block
some had 7 pedal reeds with slots in ex
some had 5 pedal with no reliefs
some were 2.4 bottom guided
some were new top guided
I saw it as R&D and using up 2.4 parts
the 91-95 blocks have smaller and lower ports than 96 up
also ex cavity was small like a 2.4 than 96 up
this block been assembled 100s of times even though never ran
hope threads not wore out by students overtightening allun
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11-18-2014, 11:12 PM #9
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must have been one of these mother merc brain hacks
i had a xr4 once that was a 2.0 it had been setting up 11 years( i bought it cheap and was the first guy in to it ) guy who bought it new hated it it had the small gearcase on it, and a stock 2.0 wont hardly twist the 178 gears, it was a nice mota inside though i changed it to horizontal front and some different heads carbs were wh41 same as all the early xr4
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