i have a efi 150. runs good, but when trolling, it will cough, about ever 8 to 10 min, the rev light and temp light comes on, and the buzzer beeps one time, like it does when first turn the key on, it comes out the hole good, top end good, idels good, outher than the cough. checked compression, all 6, 125 psi, plugs look good, spark is 7/16 with spark tester, fuel filter good, dont know where else to look.
