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09-25-2019, 07:25 PM #1216000 RPM
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09-26-2019, 09:46 AM #122
Yes sir , a # 6 O-ring x #6 male to a # 6 on the run gauge port adapter is what that is ..
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RSWORDS liked this post
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09-26-2019, 02:29 PM #123
[QUOTE=Chaz;3164628]Yes sir , a # 6 O-ring x #6 male to a # 6 on the run gauge port adapter is what that is .. [/QUOT
PM you Charlie
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09-26-2019, 05:27 PM #124
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09-26-2019, 05:44 PM #125
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10-17-2019, 11:05 AM #126Member
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10-29-2019, 11:00 AM #127
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10-29-2019, 09:46 PM #128
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10-31-2019, 10:38 PM #129
1998-2000 300 Pro Max-dual ecu
2001-2005 is 300X (2001 different coils not compatible with 2002-2005 ecu)-single Motorola ecu
2006-current is 300xs- Single Motorola ecu
Mercury never made a 300 "Pro XS" in a 2 stroke
to answer your question a 300x 2002-2004 ecu will work on your motor in everyway but not with your pencil injectors. the 300x uses the pink tip khein like a laser injected 2.5L had
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10-31-2019, 10:44 PM #130
the 2002-2004 200/225/250efi motors are basically like Chaz said a downgraded 300x.
The main difference internally is each horsepower has it's own port map.
external bolt ons:
-higher compression head
-light flywheel
-thicker reed plate with external pink tip injectors not the pencils
-carbon 5 petal reeds instead of steel 6 petal
-the throttle body is machined different inside the horn
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10-31-2019, 10:46 PM #131
Oh yeah!!! 300x block has a more open echaust chest cast into it unlike every other 3L including the 3.2L 300xs block
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02-22-2020, 11:30 AM #132Member
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So a list of parts to acquire would be helpful. I need to make my 225 efi as close to a 300 as I can. Any help would be appreciated
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02-22-2020, 03:01 PM #133
Start with cutting theback of the off and unplugging the exhaust. Itsall easy after that.
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02-22-2020, 03:16 PM #134
www.MadEFI.com
light weight flywheel
300x heads
ecu flash to 300x
pink tip injectors
billet reed plate
carbon fiber reeds
those are the bolt ons
porting the sleeves and exhaust chest are the block modsLast edited by Todd D; 02-22-2020 at 03:18 PM.
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02-22-2020, 06:10 PM #135Member
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