| Listed in parts books | Not catalogued by year yet |
MAIN JET- MONOBLOC MK1 MK2
Main jet, size 280, for the Amal Monobloc Mk1/Mk2 carburetor.
This is a main jet for the Amal Monobloc carburetor, Mk1 and Mk2 versions. Jet size 280, marked right in the part number, so if your book calls out a 376/100-280 or you're just matching what's stamped on the jet you pulled out of the carb, that's your part.
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Main jets control fuel delivery through the mid-to-upper throttle range on the Monobloc, so swapping to a different size is one of the standard ways to tune the mixture richer or leaner. If you're rebuilding a Monobloc or chasing a fueling issue, it's worth having a few sizes on hand around your stock jet to test up and down.
We don't have much more on file for this one beyond what's in the catalog listing. If you're not sure whether your carb is a Monobloc Mk1/Mk2 versus a Concentric, give us a call before you order so we get you the right jet.
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