The dry weight of Suzuki DF90A 90HP four-stroke outboard varies by shaft length:
the standard 20-inch L-shaft model weighs 156 kg (343 lbs), while the extended 25-inch X-shaft version hits 160 kg (352 lbs).
This official dry weight excludes all operating fluids like engine oil, gear lube and fuel, only covering solid core components.
Its total weight mainly comes from three parts.
First, the 4-cylinder DOHC powerhead with cast aluminum engine block, fuel injection system and heavy-duty timing chain takes up most mass for stable power output.
Second, the midsection and lengthened driveshaft add extra weight for X-shaft variants to fit taller boat transoms.
Third, the corrosion-resistant lower gearcase, plastic cowling, electric starter and 12V alternator form the rest of the load.
Weight differences exist because longer shafts need longer drive tubes and reinforced gear housings. Buyers check this figure to calculate transom load capacity, shipping costs and boat balance before installation.
