Do Mercury outboards have shear pins?
For example, in 1952 Mercury introduced the first splined propeller shaft, eliminating the need for a shear pin. A year later, Mercury introduced the first in-line four- cylinder two-cycle outboard, the Mercury Thunderbolt, ushering in the modern era of outboards.
Where is the shear pin on an outboard motor?
Take note of the hole in the driveshaft that is roughly 3/4s of the way up. This is where the shear pin is installed and replaced. If the shear pin has broken off inside of the hole, push on it firmly until it falls out.
What does a shear pin do on an outboard motor?
Shear pins are a safety mechanism so that if your propellor hits something hard, the pin will shear rather than damaging more expensive components of your motor and gearbox. We have a variety of these shear pins to cover all of the common makes of outboard motor, please review the size table to see which pack you need.
What is the purpose of a shear pin?
A shear pin (also known as a shear bolt) is a weak bolt that connects your auger to the auger shaft. That connection allows the augers to rotate, collect snow and send snow into the impeller fan where the snow is thrown from the chute.
Do boat motors have shear pins?
Outboard shear pin or hub insert To prevent gearbox damage if the propeller strikes a solid object, the prop of older outboards is driven via a shear pin, a weak link that breaks before anything else in the system.
Do outboard motors have shear pins?
What kind of metal are shear pins made of?
Common shear pins/materials used in machinery are grade 2, 5, and 8 bolts, 316 stainless, brass/bronze, alloy steel dowel pins, S.S. dowel pins, etc.
How does an electronic shear pin work?
The Electronic Shear Pin model ESP 1 & 2 monitors the current drawn by an A.C. induction motor in a manner that closely approximates the torque output of the motor.
What is a shear pin made out of?
Material. A shear pin could potentially be made from any material although metal is the most common. When making a metal object for a mechanical application, an alloy and tempering is usually selected to make the construction resistant to damage.
Why is a shear pin used on the propeller shafts of marine engines?
Shear pins as safeguards As a mechanical sacrificial part, it is analogous to an electric fuse. They are most commonly used in drive trains, such as a snow blower’s auger or the propellers attached to marine engines.
What are outboard shear pins made of?
Re: Shear Pin information Part number is 302333 and it is 3/16″ x 7/8″ , stainless steel.
How to replace a shear pin on an outboard motor?
While all outboard motors are different, this video addresses the basic concept and steps to replace a shear pin on all outboards. If you’re in the South East Florida Area and need work / service on your boat whether it’s 8 foot or 80 feet, we can help! Complete Hull, Engine, Fiberglass, Detailing, and Outdrive / Outboard Service and Repair!
How do you replace a shear pin on a drive shaft?
Coat a new shear pin with grease, if necessary, and slide it into the shear pin drive shaft hole. Replace the propeller and push it onto the driveshaft, lining the pin up with the recess that it will fit into. Turn the propeller on the driveshaft while pushing it onto the shear pin.
What does a shear pin do on an Evinrude?
An Evinrude outboard motor uses a shear pin to protect the propeller from accidental impact. The shear pin will break off when the propeller hits something underwater, such as a rock, tree stump, or other large or heavy object, allowing the driveshaft to keep turning while disengaging the propeller.
What happens when you shear off a propeller?
Turn the propeller on the driveshaft while pushing it onto the shear pin. The turning motion will come to an abrupt halt when it is seated correctly. Replace the nut and the cotter pin, if applicable, making sure to bend the cotter pin shanks to lock it in place. Shearing off a propeller pin can happen at any time.
How does shear pin work on Evinrude outboard motor?
An Evinrude outboard motor uses a shear pin to protect the propeller from accidental impact. The shear pin will break off when the propeller hits something underwater, such as a rock, tree stump, or other large or heavy object, allowing the driveshaft to keep turning while disengaging…
What kind of shear pin does a Mercury propeller use?
2.5 and 3.3 Hp 2‑Stroke 2.5 and 3.5 HP 4‑Storke 2007 and Newer Pin Drive Shear Pin for Plastic 17‑815111 Shear Pin for Aluminum 17‑815111‑1 Cotter Pin 18‑95295
Coat a new shear pin with grease, if necessary, and slide it into the shear pin drive shaft hole. Replace the propeller and push it onto the driveshaft, lining the pin up with the recess that it will fit into. Turn the propeller on the driveshaft while pushing it onto the shear pin.
Turn the propeller on the driveshaft while pushing it onto the shear pin. The turning motion will come to an abrupt halt when it is seated correctly. Replace the nut and the cotter pin, if applicable, making sure to bend the cotter pin shanks to lock it in place. Shearing off a propeller pin can happen at any time.