natemoore
Master Chief Petty Officer
- Joined
- Jun 13, 2009
- Messages
- 844
I picked up a set of NOS Medallion gauges that were meant for a 1990 Four Winns with a Mercruiser sterndrive. Since my boat is a 1987 Four Winns with a Mercruiser 3.7L and Medallion gauges, I figured the switch over should be pretty easy.
I labeled every wire as I disconnected them from the old gauges. The new gauges were practically identical, except for the face plate. Installation was straight forward. In addition to this, I also cleaned the coil terminal connections, ignition switch connections, and put some dielectric grease on the plug wires at the distributor. I'm positive that no wire got mixed up because I cleaned all terminals one at a time.
This engine usually starts in about one crank revolution, but today, no spark. I used my timing light to check the coil by placing the sensor on the coil wire going to the top of the distributor. Turned it over. Flash, flash, flash, flash. Then I put the sensor on #1 plug wire, turned it over, nothing!
One weird thing that happened was that the tachometer needle was spinning like an airplane propeller. I'm thinking I've got it on the wrong setting. The label said position 1 for 4 cylinder, but the old was was in position 2. Has something to do with the tach signal coming off the coil, so the 4 cylinder position doesn't apply?
I've got a Pertronix ignition and Flamethrower coil.
Help.
I labeled every wire as I disconnected them from the old gauges. The new gauges were practically identical, except for the face plate. Installation was straight forward. In addition to this, I also cleaned the coil terminal connections, ignition switch connections, and put some dielectric grease on the plug wires at the distributor. I'm positive that no wire got mixed up because I cleaned all terminals one at a time.
This engine usually starts in about one crank revolution, but today, no spark. I used my timing light to check the coil by placing the sensor on the coil wire going to the top of the distributor. Turned it over. Flash, flash, flash, flash. Then I put the sensor on #1 plug wire, turned it over, nothing!
One weird thing that happened was that the tachometer needle was spinning like an airplane propeller. I'm thinking I've got it on the wrong setting. The label said position 1 for 4 cylinder, but the old was was in position 2. Has something to do with the tach signal coming off the coil, so the 4 cylinder position doesn't apply?
I've got a Pertronix ignition and Flamethrower coil.
Help.
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