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We are shipping orders as fast as we can with a limited staff. 
Some shipments will be delayed 
regardless of status shown on the website.  
Mercury factory backorders are common right now and we have no guarantee of release dates. 

 UPS has suspended service guarantees and delays are common and beyond our control. 
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LUCKILY we have been stocking parts for over 40 years and have an enormous selection of parts that ship the same day! 

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Mercury Quicksilver 5-51100007P Alpha 1 Gen 2 Sterndrive 2.00 Ratio

5-51100007P Quicksilver Alpha Gen II Sterndrive 2:00:1 Ratio Standard Rotation
This is a genuine Mercury Quicksilver factory part, not aftermarket. Gimbal housing, cylinders and prop sold separately.
Please check our current stock level and order below. Use the Contact Us form at the bottom of the page for any questions
Manufacturer: Mercury Marine
Availability: 4 available
Manufacturer part number: 51100007P
Pickup or normally ships: Available - Next business day
$2,306.25
$2,144.82

Quicksilver Alpha One Gen Two 2.00:1 Ratio Standard (RH) Rotation

  • 3 year limited factory warranty
  • Low maintenance
  • Durable
  • Strong
  • Quiet
  • Corrosion Resistant
  • Repair anywhere in the world

Recommended for single installation 3.0L Alpha sterndrive engines up to 150 HP used in runabouts & pontoon boats. Not for use at high‑altitudes (5,000+ ft).

About Quicksilver: Quicksilver now offers 100% new OEM‑quality replacement sterndrives for MerCruiser and Mercury Remanufacturing for sterndrive engines without an engine mounted seawater pump.  Using proprietary forged gear sets, Quicksilver Alpha 1 Gen 2 sterndrives provide years of durable and quiet operation for a safe and sophisticated boating experience like none other. Compatible with Flo‑Torq II hubs & engines using remote drive lube reservoirs to protect your investment.

Quicksilver sterndrives feature: perma‑lube U‑joints, corrosion resistant XK‑360 alloy, a tri‑paint protection system, stainless steel shafts, ultra‑pure aluminum anodes and a genuine Quicksilver water pump impeller.

Choose Quicksilver original parts because everything is riding on it. Use of Quicksilver High Performance Gear Lube is recommended to prevent corrosion and pitting.

Read more about Quicksilver Alpha Gen 2 drives here

Quicksilver Alpha One Gen Two 2.00:1 Ratio Standard (RH) Rotation

  • 3 year limited factory warranty
  • Low maintenance
  • Durable
  • Strong
  • Quiet
  • Corrosion Resistant
  • Repair anywhere in the world

Recommended for single installation 3.0L Alpha sterndrive engines up to 150 HP used in runabouts & pontoon boats. Not for use at high‑altitudes (5,000+ ft).

About Quicksilver: Quicksilver now offers 100% new OEM‑quality replacement sterndrives for MerCruiser and Mercury Remanufacturing for sterndrive engines without an engine mounted seawater pump.  Using proprietary forged gear sets, Quicksilver Alpha 1 Gen 2 sterndrives provide years of durable and quiet operation for a safe and sophisticated boating experience like none other. Compatible with Flo‑Torq II hubs & engines using remote drive lube reservoirs to protect your investment.

Quicksilver sterndrives feature: perma‑lube U‑joints, corrosion resistant XK‑360 alloy, a tri‑paint protection system, stainless steel shafts, ultra‑pure aluminum anodes and a genuine Quicksilver water pump impeller.

Choose Quicksilver original parts because everything is riding on it. Use of Quicksilver High Performance Gear Lube is recommended to prevent corrosion and pitting.

Read more about Quicksilver Alpha Gen 2 drives here