Menu Close

What do the numbers stamped on a prop mean?

What do the numbers stamped on a prop mean?

These dimensions are used to describe the propeller, usually in inches, and always stated as diameter x pitch. For example, a propeller described as 14.5 x 19 has a diameter of 14.5 inches and a pitch of 19 inches. These dimensions are often stamped or cast right on the propeller.

What is an OMC propeller?

The Michigan Wheel Apollo is a highly polished, ultimate performance stainless steel propeller. The Apollo propeller is designed to use Michigan Wheel’s XHS exchangeable hub system. Apollo, OMC V6/V8 Sterndrive, 1978-1990, 3 Blade Stainless.

What is the best prop pitch for speed?

The lower the prop pitch, the better your hole-shot. However, this comes at a price: top speed. The lower pitch makes the engine reach maximum rpm at slower speeds. Conversely, a higher pitch will deliver greater top speeds, but slower acceleration.

How do you read a propeller model number?

The propeller diameter is a result of the difference between the first two digits and the dash number at the end of the blade model number. For example in the blade model 90DA-2 the propeller will have an 88 inch diameter (90 inches minus 2 equals 88 inches). The “DA” indicates the blade design.

Are OMC and Mercruiser props interchangeable?

An OMC prop will fit a Merc with the right hardware. To put a Merc prop on an OMC you have to modify the hub. You have to drill or grind out enough of the splines from the thrust washer side of the prop for it to slide all the way on the shaft.

How do I know what size prop is on my boat?

Propeller Nomenclature—”Prop Talk” Propeller size is expressed with two numbers, diameter and pitch, with diameter always stated first. Diameter is two times the distance from the center of the hub to the tip of any blade. Smaller prop diameters generally go with smaller engines, or with fast high performing boats.

What does the letter on a prop mean?

There are two sets of numbers stamped on every propeller. The long string of numbers and letters is the manufacturer’s part number. There are no industrywide rules to interpret this number. The smaller number describes the diameter, pitch and, sometimes, material of the propeller, according to

Will an OMC prop fit a Mercury outboard?