Has anyone had a problem with the Tach reading 700-1000RPM too high. I fired up the engine last weekend and the tach read 1450 RPM at idle and went off the scale at cruising speed. The engine was not matching the rev's of the tach, thank goodness! I own C309 #20 "Big Luv" here in Seattle and this is the first time the tach has acted up. Any Ideas? Bob