Part Fitment Help

Choosing the right marine engine part depends on more than the part name. The same type of item may vary by OEM part number, engine brand, model, horsepower, production year, shaft or gearcase size, and installation details. This page explains how to check fitment before ordering from NorthBoat Marine.

Start with the OEM part number

The OEM part number is the best starting point for confirming compatibility. Many NorthBoat Marine products are aftermarket replacement parts designed to replace specific OEM numbers. Please compare the OEM number listed on the product page with your original part, service manual, old packaging, or dealer reference.

Check engine details

Detail	Why it matters
Engine brand	Mercury, MerCruiser, Yamaha, Johnson, Evinrude, OMC, Honda, Suzuki, Volvo Penta, Yanmar, Tohatsu, and Nissan applications can use different designs.
Horsepower	The same brand may use different parts across horsepower ranges.
Model and year	Model year changes can affect housings, gaskets, impellers, fuel parts, and electrical components.
Serial number or model code	Some engines require serial-number-based confirmation.
Photos and dimensions	Photos help compare connector shape, gasket layout, impeller size, hose routing, and mounting points.

When to contact us

Please contact us before ordering if the OEM number does not match exactly, if your engine information is incomplete, if the old part has no readable number, or if the product photos look different from your existing part. Include your OEM part number, engine brand, model, year, horsepower, and clear photos of the old part and engine label.

Important compatibility note

Product titles may include multiple replacement numbers and compatible applications. These references are intended to help customers identify the correct part, but the buyer should confirm fitment before installation. If you are unsure, contact NorthBoat Marine before purchase.