Quicksilver High-Efficiency Oil Filter for MerCruiser Engines (Part 35-858004Q)

The Quicksilver 35-858004Q represents the “premium” version of the MerCruiser oil filter, combining the universality of the standard filter with the highest possible filtration efficiency. If you’re looking for extra protection for your engine – whether because you use your boat intensively, spend long hours underway, or simply want to minimize wear – this filter is made for you.

What sets the Quicksilver 858004Q apart:

• Hi-Efficiency Technology: The main difference lies in the filtering element – instead of traditional cellulose paper, it uses a synthetic blend that captures significantly smaller particles. Lab tests show over 97% efficiency at trapping typical contaminants. This means the oil circulating in your engine will be as close to pristine as possible, even after dozens of hours of operation
• Advantage in Harsh Conditions: If you often idle for long periods (trolling while fishing) or push your engine hard (water sports, long cruises), oil can get dirty faster. The Hi-Efficiency filter provides a buffer – it will maintain effective filtration even when a standard filter might already be saturated with dirt. This offers peace of mind on long voyages that even if you slightly exceed the recommended interval, your engine is still protected
• Optimized for Extended Use: In rental or commercial boats that run daily, oil and filter changes might be less frequent (based on hours). The 858004Q is built to endure these extended cycles – the strength of its materials prevents degradation or filter media collapse over time. It’s designed for long-duty performance without compromise
• Easy Upgrade: If you’ve been using the standard Quicksilver filter, switching to the 858004Q requires nothing extra. The size and threading are identical – just remove the old one and install the new Hi-Efficiency filter. You immediately get improved filtration without changing anything else on the engine
• Recommended by Professionals: Many mechanics and marine service centers recommend this filter to customers who seek extended engine life. Especially for older motors where wear is already a factor, having cleaner oil can translate to additional years of trouble-free operation. For new engines, it’s an excellent preventative measure to keep them “healthy” for as long as possible

With Quicksilver 858004Q, you’re providing top-tier care for your MerCruiser engine. It’s an investment in more worry-free boating – knowing you’re using the best factory-offered filtration available. The result is fewer deposits building up inside the engine, smoother running, and potentially lower maintenance costs in the long run.