Check/Fix/Replace Starter Motor 1996 50hp

[Mc Tool]

Thanks everybody. I arrived back from holiday, went to the boat with a better understanding of voltage drop testing. I have found a voltage drop of 1.5 V from the engine's ground back to the -ve battery post. My first job is to sort this out with new cable and connectors. More testing to follow.

Yep , you may find few more like that too and whilst 1.5v seems small (its not ) they add up .
while doing the test the meter is telling you the difference in potential between the two probes, ideally there would be none .

 

[Crosbyman]

check the video ... you could even loose that voltage between a nut and post .. make certain you scratch the b- post clean and shiny..also make certain you see 0.00 V when probes are shorted together. Meters can be iffy sometimes.

Personnal I love my old telco analog Ks 14150 meter with a " x1" scale I can 0 out with probes shorted when measuring resistances

the 3 Volts scale is great to.

 

[saltchuckmatt]

check the video ... you could even loose that voltage between a nut and post .. make certain you scratch the b- post clean and shiny..also make certain you see 0.00 V when probes are shorted together. Meters can be iffy sometimes.

Personnal I love my old telco analog Ks 14150 meter with a " x1" scale I can 0 out with probes shorted when measuring resistances

the 3 Volts scale is great to.
View attachment 415040

Yes, and rumer has it 3 nine volt battery's in series makes it work!