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Thread: SEI lower units
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08-01-2022, 10:53 PM #1Junior Member
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SEI lower units
Anyone have any feedback on SEI lower units?
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08-02-2022, 12:12 AM #2
Ive had them on both my current motors for over 17-18 years and on other motors never had a problem and im not easy on them.
LETS GO BRANDON.... LETS GO BRANDON
Sometimes I talk to myself...then we both just laugh and laugh
'84 Checkmate Convincor
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08-02-2022, 12:36 AM #3
What are you looking to use it on etc?
Last edited by mrichartz; 08-02-2022 at 12:47 AM.
LETS GO BRANDON.... LETS GO BRANDON
Sometimes I talk to myself...then we both just laugh and laugh
'84 Checkmate Convincor
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08-02-2022, 04:31 AM #45000 RPM
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Mixed results here. Ran one on a bass boat for years after they rebuilt it under warranty one time. My dad bought one with cross threaded fill and drain plugs. Both were lowers were fixed free of charge
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08-02-2022, 06:55 AM #5
I owned a 230SX stingray w/502MAG and SEI lower for 2 years and didn't break it
Checkmate 2002 Convincor 270 496 MAG-HO
2003 Cougar 22MTR w/300xs SOLD
90 21Skater w/300xs - sold
98 STV Euroski w/280 - sold
2006 Trailblazer SS 6.0l 395hp
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08-02-2022, 10:11 PM #6
i have installed about 2 dozen of them on peoples boats over the past 10 years with 1 failure and it was broken out of the box and SEI sent a new one 2nd day air with a freight label to return the bad one and we think it was damaged in shipping as the box was pretty beat up when it got to me...the rest are all still out there running around...i would have no problem running one on my own boat
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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08-07-2022, 11:31 PM #75000 RPM
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I bought a 225 efi about 10 years ago. The lower had been replaced with an sei unit. Installed it on my 200vt stratos and it lasted about an hour before snapping the propshaft and costing me an $800 prop. The did fix the lower, but I sold it right away. I think they are fine for normal use, but I would lot recommend them on any performance application
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08-15-2022, 07:29 PM #86000 RPM
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They stand behind the warrenty great and that's a good thing. I'll leave it at that
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