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First, I need to process each word, check if it's not a proper noun. Words like "Yanmar 8N21A-EN" stay. Other words like "manual" can be replaced. I'll need to find three synonyms for each word, but if a word has fewer synonyms or is a technical term, maybe just one or two. Let's start.

- engine → unit

Next, the sentence about the engine being a "high-performance diesel engine" for "industrial and marine applications." "High-performance" synonyms might be powerful, efficient, or robust. "Diesel engine" could stay as is, but maybe use internal combustion engine, combustion engine, or diesel-powered machine. "Industrial" could be commercial, manufacturing, or plant-based. "Marine" might become maritime, watercraft, or seafaring. yanmar 8n21a-en manual

I also have to watch out for technical terms like "Displacement" which should be replaced with terms like "Capacity|Volume|Displacement" (though "displacement" is also a technical term here, but maybe a different synonym like "capacity" works). First, I need to process each word, check

For the technical data and diagrams section: "Engine Diagrams: Cylinder block, cylinder head, and crankshaft components." The term "Engine Diagrams" could become Blueprints. Each component like "Cylinder block" is specific, so they stay. The verbs "comprises" in the instruction, but in the example it's "includes," so contains. I'll need to find three synonyms for each