ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Removing Outboard Lower Unit

Updated on August 6, 2016

Removing the Outboard Lower Unit

Once a used outboard has been purchased, it’s time to clean it up and decide how much work it is going to take to get the motor running again. At any point in time during these steps, one may decide that the motor is not worth repair and may be best used as a parts motor. During this process, it is a good idea to take pictures along the way so that it will be easier to put things back together. The following steps apply to a 1954 Wizard WG4 Super Twin outboard motor, but they are all very similar.

Pull The Propeller

Pull the cotter pin from the propeller shaft. This pin is used to hold the propeller nut in place. Unscrew the propeller nut. At this point, the propeller should slide off of the shaft. Beneath the propeller is the clutch. The clutch should slide off of the shaft as well. At this point, the shaft should be visible along with a retainer clip holding the impeller and associated contents in place.

Lower Brass Screw
Lower Brass Screw | Source
Upper Screw
Upper Screw | Source
Remove Lower Unit Assy
Remove Lower Unit Assy | Source
Remove Cotter Pin
Remove Cotter Pin | Source
Remove Nut
Remove Nut | Source
Remove Prop
Remove Prop | Source
Remove Clutch
Remove Clutch | Source
Remove Retainer Clip
Remove Retainer Clip | Source
Remove Pin
Remove Pin | Source
Exposed Impeller
Exposed Impeller | Source
Parts Laid Out
Parts Laid Out | Source

Remove Screws

There are usually two screws in the lower unit. One will be at the lowest point possibly made out of brass. The other will be at a higher point on the opposite side. These holes are used to fill the lower unit with grease or oil. When removing these screws.

Remove Lower Unit

Remove the lower unit prop assembly by removing the two screws that hold it in place. Once these screws are removed, the lower unit assembly should slide off the leg of the motor. There will be an old seal in between the assembly that has been removed and the lower portion of the leg. This seal should be saved so that a new seal can be made or purchased for later use.

Remove Shaft and Impeller

Remove the retainer clip with a pair of needle nose pliers. Remove the pin that goes through the shaft. This pin usually needs to be driven out by aligning it with the cut-out in the housing and driving it out with a small nail or punch. Once removed, the retaining hub can be removed. This will expose the impeller. Remove the gear shaft and impeller. Lay out all the parts on a towel and start to clean them up with a rag and mild cleaner. Be careful not to damage any seals.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)