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301358 Marine

Assembly Thermostat I

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OEM interchange

Other OEM part numbers for the same part — order from any of these makers or their dealers.

Same component rebadged by another engine marque — often the same part at a different dealer counter.

Equivalent P/NBrandDescriptionSourceConfidence
19203-73010 Kubota Kubota industrial thermostat cross-reference for M-25; note=verify exact part number forums.sailboatowners.com likely
19203-73013 Kubota Thermostat; third Kubota part-number variant for the D722/D902/Z482 thermostat family (alongside 19203-73010 and 19203-73014 already on file); note=verify which exact variant fits M-25/M3-20 amazon.com likely
19203-73014 Kubota Alternate Kubota thermostat number; note=verify which Kubota base applies c34.org; forums.sailboatowners.com likely
1E399-73010 Kubota Kubota thermostat 1E399-73010 (also 1E399-73012) listed for D722/D902/Z482 engines; Beta 600-59290 (38mm dia) is the Beta 10/14/20 Heat Exchanger & Keel Cooled thermostat per betamarineusa.com — engine family matches Beta10/14=Z482, Beta20=D722, but exact dimensional match not independently verified c34.org; fridayparts.com likely
1E399-73012 Kubota Kubota supersession 1E399-73010→1E399-73012; Beta 600-59290 already linked to 1E399-73010 — add superseding PN · 71C / ~38mm · depth:thermostats dieselpartsdirect.com likely

Aftermarket equivalents cross-ref

Third-party equivalents (Jabsco, Sierra, WIX, Mann…) — not OEM; verify before ordering. Usually cheaper than the marine dealer.

Equivalent P/NBrandDescriptionSourceConfidence
23-3337 Sierra Thermostat for M-25 and compatible models; 170°F; note=verify sierramarine.com likely

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