Nanni Diesel engines are marinized Kubota blocks — buy the tractor part

Nanni Diesel's small and mid-range engines are marinized Kubota industrial blocks. Use the Nanni-to-Kubota map to order internal service parts as cheaper Kubota agricultural spares.

Nanni's Kubota-based range

Nanni Diesel marinizes engines from several makers, but its 2-, 3- and 4-cylinder range up to the mid-size blocks is Kubota. As with Beta, the marine hardware is Nanni's; the internal engine is Kubota, so service parts cross to Kubota part numbers sold cheaply through agricultural channels.

Nanni's model numbers roughly encode cylinders and power (e.g. N4.38 = 4-cylinder, 38 hp), but the donor block is what you order parts against.

Nanni → Kubota block map (confirmed models)

The older "HE" range (2.40/2.50/3.75/3.90/3.100HE etc.) is Kubota Z- and D-series; a few of those mappings are graded likely rather than confirmed — check the confidence chip on the engine page.

Shared parts with Beta Marine

Because Beta and Nanni draw on the same Kubota blocks, many wear parts are common across both marques. For example, the F5B-9 raw-water pump impeller (Jabsco 29500-1501) is shared by the Nanni 4.150HE and N4.38 and the equivalent Beta pump. See the impeller cross-reference chart.

Filters follow the Kubota family: the V-series oil filter is Kubota HH164-32430 (WIX 51307), and the common Kubota fuel filter is 15221-43170 (WIX 33390). Full lists in the oil filter and fuel filter guides.

Find your Nanni's parts

Open your model above, then use its "Industrial / tractor part equivalents" view to list the Kubota block parts — e.g. the N4.38 savings view.

Confirm Kubota numbers against a dealer before ordering — some Nanni HE mappings are inferred from displacement/fingerprint and are graded likely. See our Methodology.

This is an independent reference guide. Part numbers are compiled from public and third-party sources and may contain errors — always verify against an official source before ordering. See our Methodology. Browse all guides.