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Cummins B Series (4B/4BT/4BTA/6B/6BT/6BTA)

The published record on this model and what owners report, with the questions worth asking while a boat is still a listing. This page covers the model. Every boat still needs its own homework.

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How to read the tags on this page. CONTEXTbackground on how this model is built or used Sources are linked where published.

Service & support

CONTEXT
Shares parts with Dodge trucks, so wearables are widely available Mid-'80s through '90s Cummins based on the B Series (4B/4BT/4BTA/6B/6BT/6BTA) share their engine block with the version put into millions of Dodge trucks, so basic wearable parts (alternators, starters, fuel lift pumps, belts) can be bought at most large auto parts stores (O'Reilly, NAPA) and delivered to town docks/marinas. Owner reports having parts delivered to marinas along the ICW. Applies to any boat fitted with these engines. src: Owners discussing diesel engine options

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