The Yamaha 150, 175, 200 and 220 use the same gear case from SEI (so I was told by the dealer) so why is 165hp ok on a 220hp motor but only 112hp on a 150? If this was an issue I …

sei lower unit i need to buy a new lower unit for my mercury optimax. i've read a lot of good comments about sei aftermarket lowers but on thier website i did not see the option for counter …

Sep 20, 2012 · I bought a new SEI lower for my 225 Optimax. I was wondering what the break in procedure is. Thanks for any help.

Jul 29, 2016 · For sure the SEI is not a clone of a Verado style gear case but a clone of the older style 3.0L gear case that is what shipped on V6 Optimax motors up to 07. So basically if this …

My lower unit went last week on my 2010 Yamaha 250 4 stroke. 680 hours. Question: Brand new Yamaha LU is $3900.

Oct 27, 2024 · The Boating Forum - Seakeeper Ride Feedback - Curious to hear from Seakeeper Ride users in the 20-30 ft...seems like a great leveling concept and I have heard that it makes …

Jun 14, 2025 · My lift cylinder started leaking after about 8 months on a new dealer installed aftermarket SEI tilt and trim assembly. Frustrated as this is the second one, I bought two new …

SEI s 3 yr no fault warrantee is hard to beat. Inlander: 12-26-2014 06:42 AM: Quote: Originally Posted by ...

Oct 2, 2023 · The Boating Forum - Mercury 400 v-10 - So what have we been hearing about Mercury 400 V-10’s. Good, Bad, any recurring issues?

Jun 5, 2017 · Shifting is different on Omc then anyone else, but like said before, when you know how to do it and get it right it is very nice. If it was abused, there is a chance your lower is shot …