1966 Mercruiser 120 no spark

I am trying to get may fathers ol boat back out on the water. I tried to get it started but no spark. There is power to the positive side of the coild. Points look good. Starter turns over

Re: 1966 Mercruiser 120 no spark

You can't look at points and tell if they are good or not. Replace them, and the condenser. The are basic tuneup items.

Re: 1966 Mercruiser 120 no spark

Klundog said:

I am trying to get may fathers ol boat back out on the water. I tried to get it started but no spark. There is power to the positive side of the coild. Points look good. Starter turns over

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any help apreciated

Re: 1966 Mercruiser 120 no spark

Don S said:

You can't look at points and tell if they are good or not. Replace them, and the condenser. The are basic tuneup items.

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OK will do

Re: 1966 Mercruiser 120 no spark

Don S said:

You can't look at points and tell if they are good or not. Replace them, and the condenser. The are basic tuneup items.

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Don, My father in law just reminded me that I'm getting no spark from the coil. Even if the points ar bad, should I not be able to turn on the ignition switch and get a spark from the coil?

Re: 1966 Mercruiser 120 no spark

Klundog said:

Don, My father in law just reminded me that I'm getting no spark from the coil. Even if the points ar bad, should I not be able to turn on the ignition switch and get a spark from the coil?

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Ayuh,... The Points, in the low voltage circuit, Trigger the Coil, in the Hi-voltage circuit...

If the Points don't go to ground, the coil will Never fire...

Re: 1966 Mercruiser 120 no spark

Klundog said:

Don, My father in law just reminded me that I'm getting no spark from the coil. Even if the points ar bad, should I not be able to turn on the ignition switch and get a spark from the coil?

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I may have not mentioned but the tim is down all the way

Re: 1966 Mercruiser 120 no spark

thanks for your patience

Re: 1966 Mercruiser 120 no spark

Klundog said:

I may have not mentioned but the tim is down all the way

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What's a "tim"

Re: 1966 Mercruiser 120 no spark

You want to get a boat going that has been sitting for years? to start.... You have points, automatic... a FULL tune up, cap, rotor, plugs, wires, points, condenser, fuel filters, and get rid of any gas over a year for sure. All these things before trying to start it. and that is just on the engine, not even getting to the drive maintenance.

Re: 1966 Mercruiser 120 no spark

Yes you are correct of course. Got the motor to fire but I have issues with fuel getting to the motor. Drained the tank and filled with 7 gallons of gas. Check the pump, diaphram appears OK and when you compress is to simulate the cam, it appears to creat pressure. I thought it was the fuel pump to figured I would get one tomorrow.
Replaced the impeller on the lower end but having a heck of a time re-assembling. I have the gear in gorward and check to make sure the tab on the upper end faces forward. Can not get it closer than 3/4" apart. I also have the upper end removed to add lube to the shaft. Shaft looks good. U-joints, look good. Any technique to re-assembly of upper and lower our drive units?