There are two sizes of filler cap used on Perkins 4.108 engines. The larger cap fits factory marinised versions, whilst the smaller cap fits automotive/industrial versions.
To ensure that this cap is compatible with your engine, please choose between external cap diameter of either 62 mm or 45 mm using the radio button selection above before adding to your cart.
You might also be interested in our header tank caps. See our listings for details.
UK delivery is by 1st class Royal Mail. European and worldwide shipping is available.