Parts Washers

Why Parts Washers Matter for RV & Marine Engines

Whether you're pulling apart an outboard motor, servicing an inboard marine engine, or maintaining your RV's powertrain, one truth holds for every repair job: clean parts are reliable parts. Parts washers are purpose-built machines and systems that use solvents or aqueous solutions to remove grease, oil, carbon deposits, and grime from mechanical components before they're inspected, repaired, or reassembled.

Unlike scrubbing parts in a household sink, a dedicated parts washer delivers more thorough results while protecting both you and the environment. The cleaning cycle — whether manual or automatic — typically circulates a washing solution through the tank, loosening contaminants so that even hard-to-reach surfaces get properly cleaned. As a result, reassembled parts fit better, seals seat correctly, and wear patterns develop as the manufacturer intended.

Types of Parts Washers

Parts washers range from simple sink-on-a-drum designs to sophisticated multi-stage systems. For RV and marine mechanics, the most practical options tend to fall into three groups:

• Solvent-based washers – Use petroleum-derived or synthetic solvents to aggressively cut through heavy grease and oil on metal components. Ideal for stubborn engine deposits common in marine and RV applications.
• Aqueous/water-based washers – Use water-based detergent solutions rather than flammable solvents, offering a safer, more environmentally friendly alternative with excellent cleaning performance on a wide range of parts.
• Bioremediating washers – An innovative category that uses natural biological agents (microbes) to break down and neutralize grease and oil contaminants into harmless byproducts, eliminating the need for hazardous waste disposal.

Top Brands in Parts Washers

CRC Industries is a well-recognized name in chemical solutions for marine, automotive, and industrial applications. Their SmartWasher® line takes a unique bioremediating approach: rather than relying on harsh chemicals, it uses natural microbes to break down grease and oil into harmless byproducts, making it a standout option for shops looking to reduce their environmental footprint without sacrificing cleaning power. CRC also offers traditional solvent-based parts washer solutions for jobs demanding fast, aggressive degreasing action.

BikeMaster brings a compact, practical approach to parts washing, particularly suited to powersports and smaller engine applications. Their portable parts washer is lightweight, corrosion-proof, and UL and SAA certified, making it a smart choice for the do-it-yourself mechanic working on motorcycles, personal watercraft, or small marine engines. Designed for use with water-based solvents, it includes a built-in filter and flexible hose brush for detailed cleaning.

Uni-Ram caters to professional-grade applications, offering an innovative range of parts washers that includes models with built-in solvent recyclers and automatic multi-jet cleaning systems. Their equipment is built for diverse sectors including automotive, industrial, and painting industries — making them a solid choice for serious shops that demand high-throughput, repeatable cleaning performance on complex engine components.

What to Consider When Choosing a Parts Washer

For RV and marine engine maintenance, consider the size of the components you'll be cleaning, how frequently you'll use the washer, and what solvent type best fits your workspace safety requirements. A portable aqueous washer suits occasional home-garage use, while a professional unit with a solvent recycler pays dividends in a busy marine or RV service shop. Always verify solvent compatibility with your chosen washer to protect both the machine's pump and the parts you're cleaning.