Free Shipping!
On All Orders Over $99*

click to zoom in

have questions?

Gearcase Adapter Ring Series B by Michigan Wheel (991216)

(No reviews yet) Write a Review
1.00 LBS
Unit of Measure:
Manufacturer Part Number (MPN):

Gearcase Adapter Ring Series B by Michigan Wheel (991216)


The V4 Vortex Gearcase Adapter Ring - 3-Blade (991216) is a circular accessory with the unique feature of having threads with two different diameters on both sides of the filter. It is for vortex propellers. It is suitable for 20-30 HP applications. Prop pushes it up against forwarding gear and receives the load from the boat propeller. This prevents the propeller from moving too far back or too far forward.

Key Features:

  • Superior lower unit filler adapter
  • 100% brand new and original engine parts manufactured with the highest quality materials available in the industry with zero fault production.
  • It is easier to replace the gear oil in your outboard motor's lower unit.
  • Built to last
  • Compact, simple to transport, and install.
  • Designed to provide maximum comfort and convenience
  • Proven and tested for dependability throughout the manufacturing process to ensure it meets our quality standards
  • Marine-grade approved product


  • SKU: 991216
  • UPC: 014984012720
  • Weight: 1.00 LBS
  • Manufacturer Part Number (MPN): 991216

This product replaces:



We can ship to virtually any address in the US. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.)

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

Need help? We're available at+1 (800) 664-8116 - Email us
to top