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I have a 100hp 4 cyl Yamaha 2000 model only 100 hours of use, no salt water use. It idles fine. When I set to full throttle it does not work normally boggs down, idles down & lacks ignition I think. I have cleaned out tank and fuel lines. Changed all spark plugs. installed new ignition wires & ignition starter (tvo of them diversed them) & installed a new one. checked time of ignition. Gas pump is ok, gas running normally carpurators clean. How can I see or know if ignition starter is getting the right signal? Anyone with comments?