Mercury MerCruiser OEM Oil Pan – 8M0150300

Mercury MerCruiser OEM Oil Pan – 8M0150300

Part Number: 8M0150300
Brand: Mercury Marine / Quicksilver
Official Product Type: Engine Oil Pan (PAN-OIL) – OEM
System: Engine Lubrication – Oil Sump / Crankcase

About This Part

This is the genuine Mercury OEM replacement oil pan for MerCruiser marine engines. The oil pan forms the lower section of the engine crankcase, serving as the reservoir for engine oil and the base of the lubrication system. An OEM replacement ensures correct fitment, proper oil capacity, and a leak-free seal at the gasket mating surface — critical on a marine engine where an oil leak can mean oil in the bilge.

Compatible Applications

• Mercury MerCruiser engines where part number 8M0150300 appears on the engine parts diagram
• Verify fitment using your engine model number and serial number against the Mercury MerCruiser parts diagram before ordering

Oil pan fitment is engine-family and serial-number specific. The same engine family may use different oil pans depending on the mounting configuration, transom angle, or production serial range. Always confirm via the Mercury parts diagram for your exact engine.

Serial Number / Fitment Note

Locate your MerCruiser engine serial number on the engine block tag or flame arrestor decal. Cross-reference this number against the Mercury MerCruiser parts diagram for your engine model to confirm 8M0150300 is the correct oil pan for your application. Oil pan part numbers can vary between otherwise identical-looking engines depending on production date and configuration.

System & Diagram Position

This part is found in the Engine Lubrication / Oil Sump section of the Mercury MerCruiser parts diagram. It is the primary lower crankcase casting that houses the oil supply for the engine’s lubrication circuit. Adjacent parts in the same diagram section typically include the oil pan gasket set, oil drain plug, oil pan reinforcement plate, and oil pickup tube.

When to Replace

• Cracked or holed oil pan from impact damage (striking submerged objects is a common cause on MerCruiser sterndrives)
• Stripped oil drain plug threads that cannot be repaired with a thread insert
• Severe corrosion or pitting that compromises the gasket sealing surface
• Warped or damaged mating flange that causes persistent oil leaks despite gasket replacement
• Engine rebuild requiring a new or undamaged oil pan

Installation Notes

• Always replace the oil pan gasket when installing a new oil pan — never reuse the old gasket
• Clean the block mating surface thoroughly before installation to remove all old gasket material and sealant
• Follow the Mercury MerCruiser service manual for the correct tightening sequence and torque specification for the oil pan bolts
• Inspect the oil pickup tube and screen for debris before reassembly
• Refill with the correct grade and quantity of engine oil as specified in the service manual before starting the engine

Related Parts

• Mercury MerCruiser Quicksilver Gasket Set Oil Pan 810846T – oil pan gasket set
• Mercury MerCruiser Oil Pan Reinforcement 14257 – reinforcement plate
• Mercury MerCruiser Gasket & Oil Seal Kit 8M0149926 – gasket and seal kit
• Mercury MerCruiser Quicksilver Crankcase Oil Drain Pump Assembly 802889A1
• Mercury MerCruiser Quicksilver Oil Drain Pump Assembly 802889Q1
• Mercury MerCruiser Quicksilver Oil Filter 8M0116378

Technical FAQ

Can I repair a cracked oil pan instead of replacing it?
Temporary repairs are not recommended on a marine engine oil pan. A failed repair at sea means oil loss, engine damage, and potential oil in the bilge. Replacement with an OEM pan is the correct solution.

Do I need a new gasket when replacing the oil pan?
Yes, always. The oil pan gasket is a single-use component. Reusing the old gasket after disturbing the joint will result in an oil leak. Order the correct Mercury gasket set for your engine at the same time as the pan.

How do I find the right oil pan for my MerCruiser?
Use your engine serial number and model number to look up the parts diagram. The oil pan part number is listed in the lubrication/sump section. If you’re unsure, contact us with your serial number and we can help identify the correct part.

Parts Desk Insights

Best use case: This is the right part for a MerCruiser engine that has suffered impact damage to the oil pan — a very common scenario on sterndrives that have struck bottom or debris. It’s also the correct choice during a full engine rebuild where the original pan is corroded, warped, or has damaged drain plug threads beyond repair.

Common mistakes: The most frequent error is ordering an oil pan by engine displacement alone without checking the serial number — MerCruiser used multiple oil pan configurations across the same engine family depending on transom angle, mounting, and production year. Also watch for customers who order the pan but forget the gasket set; always recommend ordering both together to avoid a second service visit.