|This 90 horsepower Mercury outboard, manufactured in 1980, is a saltwater model. The engine weight is recorded at 286 lbs. This is a 6 cylinder model. The displacement for the pistons is 99.8. The bore for this outboard is 2.88 inches and the stroke is 2.56 inches. This engine has power steering and a electric-type starter.|
Serial Number: 5594657
RPM Information: 4500-5000
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. Even if this information is the same as the original factory specs,
boats are sometimes modified. Thus, for safety and other reasons, it is a good idea to verify information here to
make sure it matches up with your boat.