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where are the spark plugs on a yamaha115 4 stroke motor
In the cylinder head, just follow the coil wires.
3 spark plugs
.040
One spark plug per cylinder. You didn't mention how many cylinders.
how to change spark plugs on a 97 mercury mountaineer
An 8 hp Mercury outboard uses the following plugs, depending on the model. 1986-2000, 2 stroke, NGK BP8H-N-10 (0.40 gap) 2001-2006, 2 stroke, NGK BPZ8H-N-10 (0.40 gap) 2006, 4 stroke, NGK DCPR6E (.035 gap)
The correct spark plug gap for the 2004 model, 40 hp Mercury outboard 2 stroke is .040 in.
40
The year of the motor is 1985? Then it is not a Mercury Force. Also with the plugs that it takes, there is no gap adjustment,
8 spark plugs
8 spark plugs