EXPLODED PARTS DIAGRAM

Mercury Mariner 40 HP Crankshaft, Camshaft and Internal Engine Parts Exploded Diagram

Use this Mercury and Mariner exploded diagram to identify oil pump, camshaft, piston, connecting rod, main bearing, valve and bearing shown for Mercury Mariner 40 HP. Match the numbered callout to the RECMAR reference and OEM cross-reference, then confirm the exact outboard and row-level limits before choosing a part.

Application / serial scope: No single page-level year or serial boundary is printed. Confirm the complete model, cylinder count, fuel system and serial, then apply every narrower row-level note before ordering.
Last reviewed: 2 September 2026
Parts listed: —

Parts schedule

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Parts schedule for Mercury Mariner 40 HP Crankshaft, Camshaft and Internal Engine Parts Exploded Diagram
Ref.	Part / description	OEM / cross-ref. 1	OEM / cross-ref. 2	OEM / cross-ref. 3	UN	Unit price	Order

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Crankshaft, Camshaft and Internal Engine Parts shown in this diagram

The source pack contains 2 catalogue pages for Mercury Mariner 40 HP and covers oil pump, camshaft, piston, connecting rod, main bearing, valve and bearing. The heading defines this diagram route; it does not make every component interchangeable across every version.

Lower-unit checks

Confirm the exact model, shaft arrangement, gearcase type and serial. Similar-looking housings, gears, seals, impellers and pump kits are not automatically interchangeable.

How to use the exploded diagram

Confirm the complete Mercury or Mariner model and serial details.
Find the component and note its numbered callout.
Match the callout to the RECMAR and OEM references in the schedule.
Apply every cylinder, fuel-system, serial and configuration note.
Compare the replacement with the removed part before installation.

Fitment and OEM reference guidance

No single page-level year or serial boundary is printed. Confirm the complete model, cylinder count, fuel system and serial, then apply every narrower row-level note before ordering.

An OEM number is an identification cross-reference, not proof that every scheduled item fits every outboard covered by the page heading. The selected row and exact reference control fitment.

Return to the Mercury and Mariner outboard parts hub, browse the complete exploded diagram library, or use the TMP Global Parts Finder when the exact application is unclear.

Frequently asked questions

Which parts are covered by this Mercury Mariner 40 HP diagram?

The source identifies oil pump, camshaft, piston, connecting rod, main bearing, valve and bearing within the crankshaft, camshaft and internal engine parts route. Use the numbered callout and schedule to identify the required position.

Does every listed part fit every Mercury Mariner 40 HP version?

No. Individual rows can have narrower model, serial, cylinder, fuel-system or configuration limits. The exact row and reference control fitment.

How should I use an OEM reference from the diagram?

Use it as an identification cross-reference, then confirm the RECMAR reference, callout and row-level application note before ordering.

What should I check before selecting a Mercury or Mariner part?

Check the full model designation, horsepower, cylinder count, fuel-system version, serial details and the reference on the removed component.

What information should I send TMP Global for identification help?

Send the complete outboard designation and serial, the crankshaft, camshaft and internal engine parts callout, the printed reference and clear photographs of the identification plate and removed part.

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