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Thread: 300x mid vs 300 pm mid
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03-12-2018, 02:19 PM #1
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300x mid vs 300 pm mid
what is the difference between a 300x and 300pm midsection. are they the same? what modifications do I have to make to the mid to drop on a 250xs power head.
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03-13-2018, 07:50 AM #2
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Tuners are a tad different.not sure if opti strainer and poppit align, also not sure about how the map and air sensors are affected by alien cowl, if at all. I am bolting a 250xb onto my 300pm mid, but it's kinda the same animal as any 3l efi
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03-15-2018, 07:29 AM #3
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The 300pm and 300x mids are identical for all intents and purposes.....as for mounting your 250xs powerhead on one your gonna need to change to the opti adapter plate or drill and tap the 300 adapter for the water strainer air fittings for the opti....as for the air coming in from the alien cowl it will make ZERO difference to the motor.....
1984 28 ghost twin 200 Yamah ProVs (SOLD)
1997 21 Superboat Legend 250 VMAXXX (SOLD)
2001 25 Concept CC 250EFI (SOLD)
2002 24 Superboat Step 250EFI (SOLD)
1997 21 Checkmate Pulsare 200EFI Merc (Beater Boat)(SOLD)
1994 20 Hydrasport 225 Optimax (SOLD)
1998 27 progression Twin 225 Mercs (SOLD)
2005 23 Kryptonite 300 Promax (SOLD)
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03-15-2018, 08:48 AM #4
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The only other thing is would add is that I dont believe the 300x was ever available with anything other than the sold motor mount exhaust plate but you could run into a rubber mount exhaust plate in a 300PM.
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03-17-2018, 05:16 PM #5
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all the 300 PM i saw had the hard delrin style, solid uppers,straight bolts for lowers
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03-20-2018, 12:43 AM #6
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+1 the 300 X has soild mounts and build in to the the plate
Originally Posted by vnemous
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