Impeller cover o

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

A typical water pump installation fitted with a Speedseal cover

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.

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

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

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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.

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