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HP/ Cyl/ Liter Year Spacer After Prop Mallory Spacer, Prop
20 1984-1990 18-4232  
20 1991-1999 18-4232  
30 1991-1999 18-4232  
35 1991-1999 18-4232  
25 1991 18-4232  
25 1991 18-4228  
25 1992 18-4232  
25 1984-1990 18-4232  
30(6) 1984-1990 18-4232  
35(7) 1976-1990 18-4232  
40(8) 1984-1999 18-4228  
40 Comm 1996-1997 18-4228  
40 Comm 1998-1999 18-4228  
45 Comm 1986-1997 18-4228  
48(14) 1987-1996 18-4228  
50 TTL 1996-1998 18-4228  
60 TTL 1996-1998 18-4228  
50(2) 1971-1974 18-4228  
50(1) 1975-1999 18-4228  
50 EL 1996-1998 18-4228  
50 DT 1996-1998 18-4228  
50 Comm(2) 1977-1979 18-4228  
55(14) 1968-1969 18-4228  
55 1976-1979 18-4228  
55 Comm 1980-1997 18-4228  
55 Comm(2) 1998-1999 18-4228  
60 1996-1999 18-4228  
70(1) 1996-1999 18-4228  
60(2) 1970-1971 18-4228  
60 1986-1995 18-4228  
60(4) 1980-1985 18-4228  
65(4) 1972-1973 18-4228  
65 Comm 1984-1995 18-4228  
65 Comm 1996-1999 18-4228  
70(1) 1974-1995 18-4228  
75 1975-1984 18-4228  
75 1975-1985 18-4228  
Formula E 1986-1990 18-4228  
Sprint 1986-1990 18-4228  
85(2) 1969-1980 18-4228  
85(1) 1995 18-4228  
88 1981-1995 18-4228  
90 1981-1995 18-4228  
88 1996 18-4228  
90 1996-1999 18-4228  
90 1996 18-4231 9-73905
90 V-4 1997-1999 18-4228  
90 V-4 1997 18-4231 9-73905
90 FSX(14) 1998-1999 18-4231 9-73905
90 FPX(2) 1998-1999 18-4231 9-73905
100(4) 1979-1980 18-4228  
100(15) 1988-1994 18-4228  
100(4) 1992 18-4231 9-73905
100 Comm1(4) 1996 18-4228  
100 Comm1 1998 18-4228  
100 Comm(9) 1995-1997 18-4231 9-73905
100 Comm(10) 1999 18-4231 9-73905
100 Comm(4) 1984-1990 18-4231 9-73905
110(4) 1986-1989 18-4228  
112 1996 18-4228  
115 1973-1994 18-4228  
115(3) 1996-1999 18-4228  
115 1996 18-4231 9-73905
115 V-4 1997-1999 18-4228  
115 V-4 1997 18-4231 9-73905
115 FSX(14) 1998-1999 18-4231 9-73905
115 FPX(2) 1998-1999 18-4231 9-73905
120(4) 1985 18-4231 9-73905
120(15) 1986-1994 18-4228  
125(4) 1971-1994 18-4228  
125(4) 1992 18-4231 9-73905
125 Comm(3) 1991 18-4231 9-73905
125 Comm 1992-1996 18-4231 9-73905
130(11) 1995-1999 18-4231 9-73905
135(12) 1973-1976 18-4228  
140 1977-1984 18-4228  
140 1985 18-4231 9-73905
140 1986-1994 18-4228  
140 1990 18-4231 9-73905
140 1992 18-4231 9-73905
150(3) 1978-1990 18-4231 9-73905
150(13) 1991-1995 18-4231 9-73905
150(3) 1996-1999 18-4231 9-73905
155 Comm 1984-1990 18-4231 9-73905
155 Comm 1991-1995 18-4231 9-73905
175 1977-1990 18-4231 9-73905
175(4) 1992 18-4231 9-73905
175 1993-1999 18-4231 9-73905
185 1984-1985 18-4231 9-73905
185 Comm 1991-1995 18-4231 9-73905
200 1976-1990 18-4231 9-73905
200(4) 1991-1995 18-4231 9-73905
225 1991-1995 18-4231 9-73905
200(4) 1996-1999 18-4231 9-73905
225 1996-1999 18-4231 9-73905
225(4) 1986-1990 18-4231 9-73905
235(4) 1978-1985 18-4231 9-73905
250(4) 1991 18-4231 9-73905
300(4) 1991 18-4231 9-73905
250 1992 18-4231 9-73905
300 1992 18-4231 9-73905
250 1993-1995 18-4231 9-73905
300 1993-1995 18-4231 9-73905
250 1996-1999 18-4231 9-73905
2.6L 1984-1985 18-4231 9-73905
275(4) 1986 18-4231 9-73905
3.6L(4) 1986-1990 18-4231 9-73905
OMC SEA Drive V4 1982-1990 18-4228  
OMC SEA Drive V6 1982-1990 18-4231 9-73905
OMC SEA Drive V8 1987 18-4231 9-73905
OMC SEA DriveV8 1989-1990 18-4231 9-73905
HP/ Cyl/ Liter Year Spacer After Prop Mallory Spacer, Prop
Notes:
(1) : Models equipped with small gearcase
(2) : Models equipped with large gearcase
(3) : Models equipped with V-6 gearcase
(4) : For 3-Blade propeller only
(6) : All models except DR, DE & DT
(7) : Models DR, DE & DT only
(8) : Except models RSU, RSLU, RWENB, RWLENB
(9) : Except 1992 models WTLENE, WTXNENE
(10) : Models WTLENE, WTXNENE
(11) : 1992 ES models only
(12) : Except 1992 ESX models
(13) : 1992 TL models only
(14) : Models equipped with small gearcase, For 3-Blade propeller only
(15) : Models equipped with large gearcase, For 3-Blade propeller only

$2.99 - Sierra Prop Spacer, OM#315810
Part # 18-4228
$10.99 - Sierra Prop Spacer, OM#320570
Compare at $11.99
Part # 18-4231
$1.99 - Prop Spacer, OM#323943
Part # 18-4232
$9.99 - Mallory Spacer, Prop 9-73905
Compare at $13.30
Part # 9-73905
Sierra
Johnson Gearcase Exploded View Prop Spacer, OM#315810
Sierra Prop Spacer, OM#315810
Part # 18-4228
Replaces OEM part #
  • OMC 315810


Evinrude Gearcase Exploded View Prop Spacer, OM#320570
Sierra Prop Spacer, OM#320570
Part # 18-4231
Replaces OEM part #
  • OMC 320570


Evinrude Gearcase Exploded View Prop Spacer, OM#323943
Prop Spacer, OM#323943
Part # 18-4232
Replaces OEM part #
  • OMC 323943


omc sterndrive/cobra prop spacers-mallory spacer, prop 9-73905
Mallory Spacer, Prop 9-73905
Replaces GLM #:22190
Replaces Original Equipment Manufacturer(OEM):JOHNSON-EVINRUDE
Replaces Original Equipment Manufacturer # (OEM #):320570
Fits Application:90 hp & up

This product typically leaves our warehouse in 1 business day.

To determine the shipping cost and estimated delivery date for this item click Add to Cart, then click Calculate Shipping inside your shopping cart.

General Policy

We work hard to provide you with the best value in product prices and shipping charges, and to get your order to you in a timely, safe, and convenient manner. Internet sales involve the cost of getting the product to you, and shipping carriers base that cost on the size and weight of the package, plus the distance the package travels from our warehouse to your door. We keep our product prices low, negotiate low shipping charges from our carriers and pass those savings on to you, and we don't charge sales tax (except for residents of Utah), so your order from iboats.com is the best value for all your boating needs.

Our standard shipping method is UPS ground, which typically takes 2-5 additional transit days after the order has left our warehouse, depending on your delivery address. We also offer other shipping options, including expedited delivery, and the actual delivery date will depend on the shipping options you choose.

Shipping to Canada

Most products sold by iboats.com can be purchased and shipped to Canada. Some restrictions apply to certain items, such as hazardous materials, over-weight products, and the method of shipping. Available product lines, shipping rates and fees may vary depending on the delivery address for your order.

Currently, iboats.com offers ground shipping to all Canada provinces. Our Canadian brokerage service accelerates your orders through the Customs clearance process and facilitates the delivery of your order through Canada Post or the best method based on your shipping address. We do not currently offer expedited shipping methods to Canada.

At iboats.com we want to simplify your transaction and give you a pleasing purchasing experience so you'll come shop with us again and again. We therefore calculate all the duties, taxes, and other fees specific to Canadian orders and show you the total landed cost of getting the order to your door. There are no hidden fees and will be no surprise COD charges when the package is delivered to you.

Order History & Tracking

We provide several methods to track your order and keep you informed of your order status and expected delivery date. After completing an iboats.com purchase transaction, an account will automatically be created for your provided email address. You'll receive an email from iboats.com Customer Service informing you of your new User Account and the many benefits it provides. If you don't wish to have an iboats.com Account with password, do nothing and your account won't be registered; however, you can respond to the instructions in the email and easily register your account and setup a password. This will allow you to sign in to your account by choosing the Order Status link from any iboats.com page, where you can browse your order history and track the status of all your orders - tracking numbers are displayed that link to the delivery carrier's tracking webpage.

If you have provided your email address during checkout, we will also email you your invoice, which includes a link for tracking your order and viewing the current status of your order. Refer to your invoice email and tracking link any time you wish to track the status of your order

Friendly Return Policy

  • If the merchandise you received was defective, damaged, or an error was made by iboats.com, simply return the merchandise within 30 days of the original shipping date for a full refund.
  • See the specific requirements and instructions below for United States or Canadian orders.

Returns for U.S. Customers

We want to make it as easy as possible for you to return an unwanted item; after all, we want you to return again and again as a satisfied iboats.com customer, and to also continue recommending us to your friends.

As mentioned above, if the merchandise you received was defective, damaged, or an error was made by iboats.com, simply return the merchandise within 30 days of the original shipping date for a full refund. Merchandise must still be in brand-new, unused condition with all original packaging in good condition; plus parts, accessories, manuals, and/or warranty cards included. Please note that all return merchandise must be accompanied by an RA (Return Authorization) number issued by iboats.com. To receive your RA number simply call our Returns Department toll-free at 1-800-914-1123 or email us at returns@iboats.com.

If for some reason you need to return merchandise for reasons other than those mentioned above, follow the same procedures, obtaining an RA number from iboats.com, within 30 days of the original shipping date. Please note that there may be restocking fees, shipping costs, or product change order costs associated with some returns. Feel free to check with the iboats.com Returns Department for specific terms, conditions, and eligibility.

Returns for Canadian Customers

We request that all Canadian customers verify and re-check that the products you are ordering are what you want and are correct for your application or intended use. iboats.com does not accept any return merchandise on Canadian orders, unless the merchandise you received was defective, damaged, or an error was made by iboats.com. In such cases, return the merchandise within 30 days of the original shipping date for a full refund, following the procedures below.

Canadian orders involve many additional costs dealing with Customs, Provincial taxes, brokerage fees, and more, making product returns complicated and very expensive and costly for both the customer and iboats.com. Again, help us serve you best by verifying that the products you are ordering are what you want so we don't have any costly returns or have to deny a return.

If a return meets the criteria mentioned above, merchandise must still be in brand-new, unused condition with all original packaging in good condition; all parts, accessories, manuals, and/or warranty cards included. Please note that all return merchandise must be accompanied by an RA (Return Authorization) number issued by iboats.com. To receive your RA number call our Customer Service Department toll-free at 1-800-914-1123, Tuesday-Friday, 10am-7pm EST, or email us at returns@iboats.com. We will provide further details on where and how to mail the merchandise. Please note that returns sent from rural Canadian addresses may take up to five weeks to process after the package is mailed.

Do you need Professional Installation? iboats.com has teamed with a national network of independent installers that are ready to handle your installation needs.
Find your local Amtech dealer:
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