‎I had a similar problem 3 seasons ago. 
It was bad or corroded connections and wiring. 
35 years is pretty good, but everything needs replacing eventually. 
I replaced all the major electrical lines around the batteries, main switch and engine with pre made auto lines from Canadian Tire (maybe Autozone in the US). Cost was about $65 CDN for my 26 
No more problems since.

sam :-)
C&C 26 Liquorice 
Ghost Lake Alberta 

From: Dennis C. via CnC-List
Sent: Friday, May 22, 2015 7:58 AM
To: CnClist
Reply To: cnc-list@cnc-list.com
Cc: Dennis C.
Subject: Re: Stus-List Starting problems

Just a caution, a check of voltage or resistance is only a part of the puzzle.  If the connection(s) on one or both ends are corroded, it may still pass a small amount of current to show voltage but may not pass enough current to support the user, i.e. pump or starter, etc.

Connections must be clean to pass current.

Dennis C.

On Fri, May 22, 2015 at 8:00 AM, Edd Schillay via CnC-List <cnc-list@cnc-list.com> wrote:
Derek,

Sounds like you have an intermittent wiring problem. Grab your voltmeter and check each connection. 

Could also be your starter solenoid. 

Good luck. 


All the best,

Edd

-------------------------------
Edd M. Schillay
Starship Enterprise
NCC-1701-B
C&C 37+ | City Island, NY
-------------------------------
914.332.4400  | Office
914.774.9767  | Mobile
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Sent via iPhone 6
iPhone. iTypos. iApologize

On May 22, 2015, at 8:32 AM, Tortuga via CnC-List <cnc-list@cnc-list.com> wrote:

I’m having ignition problems with the 2QM15 engine in my C&C 30 mk1. Normally, when the main switch is turned to on, the oil pressure alarm sounds. Pressing the starter button starts the engine and the alarm stops.


This season, after a few successful starts, when I turned the main switch on one day there was no alarm and nothing happened when I pressed the starter. No cranking. Not a sound. My batteries spent the winter in my basement and were fully charged. As well, shore power was plugged in and the charger showed full charge on both batteries.


This happened once or twice last season but when I repeated the process the engine started.


I assumed that the main switch was worn out and ordered a replacement Yanmar switch from Rosborough Boats. It was my first dealing with them and I was very impressed. Rob Manual had a new switch to me within a day.


I had carefully labelled and photographed the connections at the old switch before removing it, but when I installed the new one it didn’t solve my problem. When I keyed the switch on, I got a very weak sounding alarm and pressing the starter button got no reaction.


I’m unskilled at tracing problems, so thought I’d ask for help. Thanks in advance


Derek Kennedy

Tortuga

C&C 30 mk1

Ballantyne’s Cove, NS

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