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Hi, looking for some guidance on what I think is a voltage drop situation in my 1972 Johnson 100HP outboard. Having a hard time tracking it down. I am mostly concerned with this due to my power pack not getting 9.5 volts when key switch is in start position(it’s at 8.5). Here is what I have done already:
Bought a new battery – I read 12.1 volts off it.
Tested my battery cables and I get .74 volts for both, very close to spec from what I hear.
My voltage tests when in start position:
Solenoid - one of the inner posts 8.7V, the other .49V.
Starter – 9.2 volts at terminal.
Those voltage tests are with the power pack not connected to power source, when I connect the power pack the voltage goes down a bit more. Could someone give me a suggestion on what to test to isolate the problem? I’m just a rookie at this stuff and got the boat as a hand me down from Dad. Thanks for any replies!
Bought a new battery – I read 12.1 volts off it.
Tested my battery cables and I get .74 volts for both, very close to spec from what I hear.
My voltage tests when in start position:
Solenoid - one of the inner posts 8.7V, the other .49V.
Starter – 9.2 volts at terminal.
Those voltage tests are with the power pack not connected to power source, when I connect the power pack the voltage goes down a bit more. Could someone give me a suggestion on what to test to isolate the problem? I’m just a rookie at this stuff and got the boat as a hand me down from Dad. Thanks for any replies!
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