TH400 SFI CLOSE RATIO 3 SPEED

Marsoni

M251S

$6050.00

Get it in 3 business days with 1 day shipping. Friday, May 29

TH400 SFI CLOSE RATIO 3 SPEEDTH400 3 SPEED CLOSE RATIO The 3 speed close ratio advantage. Keep the engine in the RPM window of power with minimal shift drop. 6 8 WEEK DELIVERY BUILD ER BILLET VALVEBODY W PRO BRAKE SHIFT PATTERN (YOUR CHOICE) AERMET 1 30 SPLINE INPUT SHAFT AERMET 1 MAIN SHAFT 7075 Aluminum 4340 Combo Forward Drum 7075 Aluminum 4340 Aluminum Direct Drum Pro Mod Intermediate Sprag (Super Sprag) 4340 BILLET Stator Support 4340 HD Billet Clutch Hub 4340 Billet Direct

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We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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This product was definitely different than the original I have a 2001 Bayliner with a 3.0 MerCruiser and an alpha one second GEN drive The kit worked but the bottom gasket had a weird cut different than the original I added a gasket maker just in case (Yamaha Lube) Brand! All in all kit was fine, One thing to note is the directions that come with the kit at least for my version we’re not for the same alpha one second GEN 4 stroke kit that I got they were for a two-stroke in the pictures didn’t look the same as the parts that I had got which is fine but it’s miss leading when you send a 4 stroke kit but 2 stroke 90hp to 200hp alpha one directions! If it craps out this review will change

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Reviewed in the United States on June 30, 2020

Verified Purchase

Air Assault

West Palm Beach, US

★★★★★ 5

Super great product. Has the power and functionality to get you repairing fast!

Super great product. Has the power and functionality to get you repairing fast! Fully recommend this and it has worked great since I've owned it. Still going strong in the durability and design looks like it will keep it going strong for many years. Highly highly recommend buying this. Will work in Kuwait, Iraq, UAE, and Saudi. Good for Camps around the CENTCOM area!

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Reviewed in the United States on October 6, 2025

Verified Purchase

Jed V

Port Orchard, US

★★★★★ 5

Solid Product

worked well, easy to install.

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Reviewed in the United States on November 3, 2025

Verified Purchase

Port Orchard, US

★★★★★ 5

Excellent wire!

Size: 2 Colors each 10FT, Style: 10AWG

This wire is very soft and flexible. Many strands and tinned nicely. A perfect upgrade for my power wheel wires that keep melting. These have been running for months in exterior environment without any issues.

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Reviewed in the United States on October 31, 2025