1956 Mercury 30 HP
Mark 30

This 30 horsepower Mercury outboard, manufactured in 1956, is a freshwater model. The engine weight is recorded at 118 lbs. This is a 4 cylinder model. The displacement for the pistons is 29.7. The bore for this outboard is 2.11 inches and the stroke is 2.12 inches. This engine has power steering and a electric-type starter.

RPM Information: 5400
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.

The iboats Outboard Motor Forums are another excellent source of information.

The iboats Forum Directory can likely help you find a lot of outboard information as it is arranged by subject.

Engine Manual:
Mercury Outboard Manual
Information on this page has come from multiple third parties and can not be guaranteed to be accurate.