Where is an outboard horsepower measured?
prop shaft
Shaft horsepower is measured at the prop shaft. It’s bhp minus the power lost to gears and bearings. Maximum shaft horsepower is estimated to be 97 percent of maximum bhp for gas and diesel inboards.
Where is the part number on a Mercury lower unit?
For Mercury outboard engines 8hp and higher, your engine serial number (ESN) tag can be found halfway down the transom assembly on the right (starboard) side, just below the engine’s powerhead. For engines 6hp and lower, you can find your Mercury outboard serial number on the top of the swivel bracket.
What year is Mercury outboard serial number?
Every Mercury outboard has a serial number label located on the transom bracket area of the engine. The latest serial number labels display a 2-digit number in a box at the lower right portion of the label. These digits coincide with the last two digits of the year in which the outboard was manufactured.
When did outboards start measuring hp at the prop?
The standard for horsepower measurement of outboard motors appears to have changed in c.1983 with the publication of Internation Council of Marine Industry Associations Standard No. 28-83 (ICOMIA 28-83). This standard specified a measurement technique for horsepower which is now in widespread use.
Where is the horsepower on my boat?
According to federal law, motorized boats that are less than 20 feet in length must have a capacity plate in the steering or helm area. The capacity plate is where you can you find the maximum horsepower for your boat. Here you also find the maximum weight and size of engine.
Where is the model number located on a Mercury outboard?
For Mercury Outboard, your serial number will be located on a rectangular tag on the starboard (right) side of your motor on the transom mount. In engines 8HP and higher, the ESN is on starboard (right) side – halfway down the transom assembly, just below the engine’s powerhead.
How do I find my Mercury part number?
For Mercury outboards, the serial number label is located on the transom bracket. You can locate the MerCruiser serial number label on either the side of the engine or on top of the flame arrester cover.
How do I know if my lower unit is good?
Bad outboard lower units can give the operator shifting issues, and other signs will include water in the gear lube, metallic particles on the drain screw magnet, clunking sounds when shifted, or the loss of the ability to shift into gears.