What is an OMC propeller?
Tacoma Propeller stocks a large variety of aluminum and stainless steel Outboard Marine Corporation (OMC) sterndrive boat propellers for any size boat motor.
Are 3 blade props better than 4 blades?
The most asked question at the boat shows is almost always “what is the difference between a 3-blade and a 4-blade boat propeller?” The difference between a 3-blade prop vs a 4-blade prop is that the 3-blade (smaller blade ratio) is faster with a higher top speed and the 4-blade (higher blade ratio) has a better hole- …
What pitch of prop should I use?
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.
What is the difference between a 17 and 19 pitch prop?
The 17″ prop will give you a better hole shot but lower top speed. If it is to small it the engine may go over the recomended top RPMs. The 19″ prop will give you less of a hole shot but a higher top speed if the motor is strong enough to turn it in the recomended top RPM range.
What’s the difference between a 19 21 pitch prop?
Propeller pitch typically referred to as “prop pitch,” is essentially the distance a propeller would move in a single revolution through soft solid. So, in this case, a “21 pitch prop” would move 21 inches forward in one revolution, and a “19 pitch prop” would move 19 inches forward in one revolution.
Who makes OMC Cobra?
OMC Sterndrives In the mid 80’s OMC or Outboard Marine Corporation introduced the OMC Cobra, a sterndrive that was modeled after the leading Volvo outdrives. We stock OMC Stern Drives for all of the OMC models including OMC Cobra, and the mechanical and electric shift OMC Stringer.
How do you measure a propeller?
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 is the best prop for top speed?
Enertia 14 1/2″ x 18. The 18-inch-pitch Enertia propeller delivered the best top speed and the worst hole shot. It’s expected that more pitch will equate to higher speed, since pitch is the nominal distance the propeller moves through the water for each revolution.
What does Overpropped mean?
Over propped means the engine cannot achieve its max rated RPM. Under propped means the engine reaches max RPM too easily ie: the boat doesn’t go as fast as one would expect. Both effects are caused by a combination of pitch and prop size.
Is it bad to run an outboard engine at full throttle?
Does this mean an engine should never run at wide-open throttle (WOT)? Absolutely not. Modern engines are designed to handle WOT. Also, during break-in going to WOT, as prescribed by the owner’s manual, is necessary to properly seat the pistons’ rings.
Are OMC Cobra outdrives any good?
The OMC Cobra is actually a good drive. The downfall and bad reputation can often be contributed to misadjusted shift cables, engine idle too high, and inoperable ESA switches.