Where can I find replacements for discontinued impeller cover o-rings? PBO's engine expert, Stu Davies has some suggestions

I have an ETAP 24i with an inboard Yanmar diesel engine.

Changing the water pump impeller is a really fiddly task with the main problem being access to the housing cover nuts.

Impeller cover o-rings

Speedseals come in various sizes so O-ring size will need to be measured carefully

Back in 2015, I saw an advert in PBO for the Speedseal Easy Slider cover – I bought one and have been well satisfied with it ever since.

However, it’s now time to replace the O-ring in the cover housing and I have no idea where I can get them as True Marine, which were selling the Speedseal, seems not to exist now.

Do you know where I might obtain the correct size of O-ring?

Martin Pagett

Stu Davies replies:

The Speedseal is a good product and I have one myself on my own boat.

Unfortunately the company has ceased trading and parts are almost impossible to find.

O-rings come in various diameters and thicknesses

O-rings come in various diameters and thicknesses

However O-rings can be bought as a generic item from suppliers such as Simply Bearings (simplybearings.co.uk) or MSK (marineservicekits.co.uk).

Continues below…

Careful measuring of the groove in the cover plate will be necessary, but they should be able to help provide the correct size of O-ring.

When I next visit my boat I’ll take the sizes of the O-ring for mine, but I’m pretty sure the pumps on different engines have different size O-rings.

Enjoyed reading Impeller cover o-rings?

A subscription to Practical Boat Owner magazine costs around 40% less than the cover price.

Print and digital editions are available through Magazines Direct – where you can also find the latest deals.

PBO is packed with information to help you get the most from boat ownership – whether sail or power.

        • Take your DIY skills to the next level with trusted advice on boat maintenance and repairs
        • Impartial in-depth gear reviews
        • Practical cruising tips for making the most of your time afloat

Follow us on Facebook, Instagram and Twitter