Need to know if its 2 or 4 cycle.
The dry weight of a 1983 model, 40hp Mercury outboard, is 156lbs.
The serial number 6362532 for a 40HP Mercury outboard indicates that it was manufactured in 1982. Mercury outboard motors have serial numbers that can be traced back to their production year using specific resources or databases. To confirm the exact production date, it's often best to consult the manufacturer's documentation or a Mercury dealer.
A 40 hp Mercury outboard, serial number 5897057, would have been manufactured in late 1981.
I would say one per spark plug.
The plug gap for a 1995 model, 40 hp Mercury is .035 in.
The dry weight of the Mercury outboard FourStroke 40 HP boat motor released in 2005 is approximately 250 pounds. Later versions of this motor are slightly lighter.
To rebuild a lower unit on a 40hp Mercury outboard, start by removing the lower unit from the engine by unscrewing the bolts and disconnecting the shift linkage. Drain the gear oil and disassemble the lower unit, noting the arrangement of parts. Replace worn components such as seals, bearings, and the water pump, then reassemble the unit, ensuring all parts are properly aligned. Finally, refill with the appropriate gear oil and reinstall the lower unit on the outboard.
For a 1991 4-cylinder 40hp Mercury outboard, the recommended spark plugs are typically NGK BPR6HS or Champion QL77JC4. It's important to verify the exact specifications in your owner's manual, as variations may exist based on specific engine configurations or modifications. Always ensure the spark plugs are gapped correctly according to the manufacturer's specifications before installation.
If operating the engine without the oil injection system, supplied with the engine, use a 50:1 ratio. When using the oil injection system, no additional oil is required.
how do u check timing in a 40 hp yamaha 2 stroke
yes
you can't