Just bought a used 1985 Yamaha 70hp ETLK. Engine runs good for the most part but surges at times at 3/4 or higher throttle. Will be changing the engine fuel filter, the fuel line, the bulb and the in-line fuel filter. Want to change the spark plugs but not sure what plugs to use. Pulled the plugs and all are different. Can someone tell me what the correct recommended plugs are for this engine and the gap setting.
thanks
thanks