Engine Control Panel Issues

Scott2

.
Sep 26, 2008
58
Hunter 240 Hayward, WI
Hi All, I posted this on the C270 Yahoo group also.... Just looking for a little guidance:

Since I put my C270LE in the water this spring my engine control panel seems to be acting up intermittently. 2/3 of the time it acts normal and seems to act up after I have been running the engine for a while. I would be much obliged if someone would point me in the right direction for troubleshooting. I have an 18Hp Perkins M20 Perama. Here are all the instances in order:

1st event: Turned off the engine via the "T" handle with the key in the ON position and did not get any warnings. After a couple hours of sailing, I turned the key on and all warnings worked as they always do until I started the engine, then the warning horn continued to sound while the Battery light and Oil light remained illuminated. Shut the engine down and checked the oil (full) and the batteries (both about 12.6 Volts). Waited a few minutes, turned the engine on and all indications were normal.

Sailed a couple times with normal engine indications. (Minimal use of the Engine).

Event #2: Motored for a while before sailing due to light winds. Turned off the engine with normal indications. After a few hours of sailing, I started the engine and the Battery warning light stayed illuminated with a warning horn. Both batteries were above 12 volts but swapped them over. Light stayed on and horn continued to sound

In addition, the fuel gauge is not working (shows empty though it is full). and the hour meter does not count engine hours.

Does anyone have an idea where I can start troubleshooting this problem? The gauges and panel worked fine when the boat was put on the hard last fall. Thanks very much for any guidance.

Best Regards,
Scott
 
Sep 15, 2013
707
Catalina 270 Baltimore
Scott. Check my attachment. Is this the same panel you have? There are a few kinds on the 270. I may be able to help as I have a little experience with this one. I am also a member of that group but could never figure it out. This forum is way easier.

Instrument panel.jpg
 

Attachments

Dec 28, 2010
462
Catalina 380 san pedro
start looking at the various connections on the back of the panel and work your way back towards the engine ground. Look for any signs of corrosion etc. Clean connections are a biggie with this sort of problem. It almost sounds like you have corrosion on one or more plugs that are causing a path to ground allowing the horn and light to sound. I can't say for certain but it's a place to start.
 
Jun 8, 2004
2,906
Catalina 320 Dana Point
Probably start with just cleaning all the contacts behind the panel, when I had a fuel gauge problem it was the gauge and not the sender. This page shows how to tell if it's gauge or sender.
https://www.jamestowndistributors.c...TMTechCat-Instruments(v4_0)Tech_Reference.pdf
Not sure if it relates to your intermittent problems but after my whole panel went dead while the engine was running I discovered that all power for the panel goes thru a large (20 amp?) inline fuse. This inline fuse holder is a little weak and after time the contacts get corroded, it's located on top of the engine in the main harness. It was inside some corrugated plastic split tube and many layers of electrical tape. I think I was tracing the wires from panel to locate it, it's on the wiring schematic with out any hints to location.
When this happened the engine would continue running but if stopped would not restart and all gauges were dead.
 
Feb 26, 2004
22,894
Catalina 34 224 Maple Bay, BC, Canada
Scott,

Good advice. Whenever something electrical is intermittent, 99% of the time it is connections.
 

Scott2

.
Sep 26, 2008
58
Hunter 240 Hayward, WI
Thanks everyone, can't wait to dig in and start cleaning connectors. Scott
 
May 24, 2004
7,140
CC 30 South Florida
Intermittent electrical panel problems in older boats can often be traced to chaffed insulation and shorts in the wiring harness leading from engine to control panel. The harness is usually routed around sharp fiberglass corners and with years of hull flexing these corners can and do chaff the insulation of the harness and wires. A visual inspection of the harness can determine any damage and its location. Like others have pointed out connections are usually the cause but it might be worthwhile to inspect the harness.