I would say one per spark plug.
The dry weight of a 1983 model, 40hp Mercury outboard, is 156lbs.
A 40 hp Mercury outboard, serial number 5897057, would have been manufactured in late 1981.
Need to know if its 2 or 4 cycle.
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.
I have a 1996 Mercury 4 cylinder 40hp with 125 Psi across all 4 cylinders. I also have a mid 80s Mariner/ Yamaha 40hp 2 cylinder with 123 Psi both cylinders. I'm not sure what factory specs are, but maybe this would help.
how do u check timing in a 40 hp yamaha 2 stroke
yes
To determine the year of a Mercury 40hp outboard motor with the serial number 2877503, you can refer to Mercury's serial number lookup charts, which typically indicate that this serial number corresponds to a model from the mid-1980s. Specifically, it is likely from around 1986. For the correct propeller size and pitch, you should consider the specific application and boat specifications, as well as consulting a marine professional for recommendations.
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.
The dry weight of a 1992 40hp Johnson is between 180 and 190lbs. depending on the model.
it is exact 67 kgs