Hi,
We have a 1985, 470 MerCruiser, 170 horse (2BBL), 3.7 liter, 4 cylinder, with the serial number: #6924884. My husband has replaced the sparks, distributor cap, points, rotor and the thing is still back firing when we start it. It starts up but won't idle. Any ideas for us. We have a houseboat rented and hope to take the boat with us in 2 weeks.
We have a 1985, 470 MerCruiser, 170 horse (2BBL), 3.7 liter, 4 cylinder, with the serial number: #6924884. My husband has replaced the sparks, distributor cap, points, rotor and the thing is still back firing when we start it. It starts up but won't idle. Any ideas for us. We have a houseboat rented and hope to take the boat with us in 2 weeks.