Methodology and data sources

Where the numbers come from, how sure I am of a match, and what I put on the page.

What I look up

• The same physical part across marques. Shared bits between marinizers.
• Wear items to aftermarket. Impellers, filters, belts, anodes, thermostats, pumps, seals and bearings. Jabsco, Sierra, Mann, WIX, Gates, Tecnoseal and similar.
• Marine internals to the industrial block. Most of the engines I cover started as a tractor or industrial diesel (Kubota, Mitsubishi, Ford and so on). You can often buy those internals through agricultural channels for a lot less.

Where the numbers come from

Public manufacturer catalogues, published interchange lists, and supplier data. They sit in one lookup so you can find the cheaper number.

How sure I am

Every match has a grade:

• confirmed: an authoritative source, or more than one independent source.
• likely: a credible source I haven't double-checked myself.
• unverified: a thin source. Treat it as a lead.

Check a number against a dealer or an official catalogue before you order.

Catalogues and copyright

I publish part numbers and engine specs as identification. OEM catalogue PDFs and dealer prices stay with their owners. Names and trademarks stay with their owners.

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