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1990 Mariner by Mercury Marine 90 HP 90ELPTO This 90 horsepower Mariner by Mercury Marine outboard, manufactured in 1990, is a saltwater model. The engine weight is recorded at 299 lbs. This is a 3 cylinder model. The displacement for the pistons is 71.1. The bore for this outboard is 3.38 inches and the stroke is 2.65 inches. This engine has power steering and a electric-type starter.

Serial Number: C221500 RPM Information: 5000-5500 Your engine's RPM range is important in choosing the right propeller for a given application. For example, if you look at your tachometer at top speed and it is not within the engine's RPM range then that is generally not good. You want your RPM's to be within the proper range while at wide open throttle (WOT). Be sure to do your testing under your normal boating conditions and with a good propeller (not bent, cracked, or excessively chipped). Information on this page is provided to you as a free service of iboats.com. Because this information has come from many sources we can not guarantee its accuracy. download 2018 Mercury 250 Pro Xs Service Manual here. Even if this information is the same as the original factory specs, boats are sometimes modified.