Radiator caps
May I recommend visiting the Perkins website? There you can link to a local distributor or find a local retailer for your parts needs. I have included the link below; you'll need the model number which is stamped on the engine (website shows where to find this). It looks like there a scads of different engine models - maybe they all use the same radiator cap, but then again, maybe they don't!Jim s/v: The Merry BeeM28 O/I