Quicksilver Oil Filter for Mercury 75–115 HP FourStroke (35-877761Q01)

The Quicksilver 35-877761Q01 oil filter is designed for Mercury and Mariner mid-range 4-stroke outboard engines – from 75 HP up to 115 HP. It is even used on the popular Mercury 150 EFI FourStroke (3.0L, introduced 2012), demonstrating its high efficiency and versatile design. Whether your boat runs a trusty 90 HP for fishing or a 115 HP on a family runabout, this genuine filter will keep your engine well-protected.

Quicksilver 877761Q01 meets all Mercury requirements. It features an integrated anti-drainback valve that retains the necessary oil in the filter when the engine is off. Thus, when you turn the key, oil pressure builds immediately and oil flows to the top of the engine without delay. This is especially important for modern EFI (Electronic Fuel Injection) engines, where instant oil pressure contributes to a quiet, smooth start.

The filter element in this model is optimized to capture abrasive particles (like dust, sludge, tiny metal shavings from wear), preventing them from circulating through the engine. This significantly reduces wear on pistons, cylinders, and bearings, effectively extending the time between overhauls. The filter’s sturdy canister is built for the marine environment – it resists corrosion and vibration, so whether you’re idling or running wide-open throttle, the filter stays intact and seals properly.

For Mercury FourStroke engines 75-115 HP, the manufacturer recommends changing the oil and filter every 100 hours or once per year. This filter is easy to replace and fits exactly (it supersedes the OEM filters used in factory service kits). By using a genuine Quicksilver part, you ensure peace of mind and guaranteed compatibility – with no risk of leaks or improper bypass function that can happen with incompatible aftermarket parts.

• Compatibility: Mercury/Mariner FourStroke EFI – 75 HP, 80 HP, 90 HP, 100 HP, 115 HP models (approx. 2004 and newer); also Mercury 150 HP EFI (inline-4, 3.0L, 2012+). Note: Not intended for older 2-stroke or Optimax (DFI) models.
• Application: An excellent choice for mid-size boats – fishing rigs, pontoons, watersports tow boats – where these engines are commonly used. The filter helps maintain optimal performance during long cruises or when towing skiers/tubes.
• Tip: Always warm the engine to operating temperature and then shut it off before changing oil and filter. This helps drain the old oil more completely and makes the filter easier to replace. After the change, check for leaks around the filter at first startup.