SKU: 43857376679

LRB-303 DIY 303 Kit

Sale price$327.15 Regular price$363.50
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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17

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Description

LRB-303 DIY 303 KitPLEASE READ There are a limited number of kits in stock. A second large batch has been ordered and will be ready to ship in 2 3 weeks so I am making those available to order now. Orders will fulfilled in the order received. If you are interested in an assembled device click here This a complete kit to build the LRB 303 synthesizer. This is NOT a beginner kit and some kit building skills are necessary. Boards are 4 layer FR4 ENIG plated and fully ROHS

PLEASE READ

There are a limited number of kits in stock.  A second large batch has been ordered and will be ready to ship in 2-3 weeks so I am making those available to order now.  Orders will fulfilled in the order received. 

If you are interested in an assembled device click here

This a complete kit to build the LRB-303 synthesizer.    This is NOT a beginner kit and some kit building skills are necessary.  Boards are 4 layer FR4 ENIG plated and fully ROHS Compliant.

Tools Required:

Soldering Iron 
Solder (ROHS SAC305 solder is used on the board)
Trimmer Adjustment Tool or Small Blade flat screw driver
Wire Strippers

BUILD GUIDE HERE (work in progress)

User Manual: https://github.com/djphazer/OS-303/wiki/User-Guide

Build Support can be found on the Discord Channel

This kit includes:

  • SMD populated LRB-303 Mainboard
  • SMD populated LRB-303 Switchboard
  • Alps Tact switches, LEDS, Standoffs
  • Switched DIN Socket
  • Mainboard Through hole parts (8 Pots, 2 Brackets, Slide Switch, Audio, DC, CV Jacks)
  • Precut and Tinned Ribbon Cables (4 Pcs)
  • Alps Rotary Switches
  • Precut interconnect wires
  • OS-303 Processor with MIDI harness
  • Dust Covers (4 pcs)
  • Rub-on Case Art Sheet
  • Metal Keyboard panel

NOT Included:

  • Knobs/ Button Caps.  Available from Krumptronics or Sound to Parts
  • Case AVAILABLE HERE

Case Ordering Instructions:

Any Material Can be used for the case however I recommend 9600 Resin with Spray Painted Surface finish.  That is proven good.  JLC will probably complain about wall thicknesses, tell them that you accept it as is.   Clear is cool however the material does not have great dimensional stability so warping with clear is possible, YMMV.  Make sure you select "Plastic Enclosure" as the application

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43857376679

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4.7 ★★★★★
Based on 27 reviews
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Verified Purchase
nastyfishy
Grantham, US
★★★★★ 5
10 out of 10
The must do service package. This is a "fits multiple" kit so youll have some extras. The kit also includes the lower unit gear oil seals, which is awesome. I always trust quicksilver to be durable and a great value for the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026
L
Verified Purchase
Lucas Zoll
Cuba, US
★★★★★ 5
Recommended replacement parts
Worked as advertised, quicksilver parts for replacement on alpha drive gen 2 outdrive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
C
Verified Purchase
charscars
Alexandria, US
★★★★★ 5
Very complete kit
This Kit has everything you need to change your waer pump impellor. It comes with directions that are easy to follow, but there re plenty of videos available to help. The Quicksilver kit is priced well and was delivered quickly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 13, 2025
E
Verified Purchase
Eric Moore
Bozeman, US
★★★★★ 5
Perfect OEM fit
Fixed my impeller on my Mercury Salt Water 115. Best done as a two man job. Lots of videos available online .
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Reviewed in the United States on April 14, 2026
A
Verified Purchase
Aiden
Carnegie, US
★★★★★ 4
Fits 2001 Bayliner
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

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