Starting challenges

A/C & D/C Wiring, GPS, Radios, etc.
Tin star
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Joined: Mon Aug 13, 2018 8:01 pm

Re: Starting challenges

Postby CapnGary » Sat Dec 28, 2019 8:24 pm

I hope your battery tested for more than 12V.

A 12-volt battery should read between 12.5 and 12.7 volts when it isn't being used. A 6-volt battery should read between 6.25 and 6.35 volts. Anything less than 12.5 or 6.35 volts indicates your battery needs to be charged or replaced (if its charge depletes quickly).

Not saying this is the problem. but how many times does an electric problem on a car result from a bad battery which one thinks is ok?

Site Admin
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Re: Starting challenges

Postby jralbert » Sat Dec 28, 2019 9:54 pm

symptoms suggest weak connections as Karl hints. Check for corrosion, loose connections as first step
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

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Re: Starting challenges

Postby EWRice » Mon Dec 30, 2019 10:58 am

The toggle switches used for ignition on Ms, and many other boat, do not hold up as well as a high amp switch (like a key switch, push button or heavy duty toggle). I bet 90% of the starting and running issues I have seen in boats with the plastic switches are because of the switches. Voltage drop tests are a must.
Muskegon Lake
1972 32' Express flybridge
Twin 318s
On board air & prime 920
1963 Thompson Super Sea Lancer
Graymarine 327
1961 Alumacraft 12'
'55 10hp Johnson