Prop size.

[hanleyclifford]

Jerry - How do you feed/sense the tachometer?

[tac]

Circuit Protection

An alternative to the buss connection is to use a fuse panel, like the Blue Sea 5015 for AGC fuses, or the 5028 for ATOs. This gives the ability to provide protection for each branch circuit based on its wire size.

[roadnsky]

Jerry - How do you feed/sense the tachometer?

The - Terminal of the coil fed from the buss bar.

[Shrek]

Bus bar in my immediate future

7am at my local marine store tomorrow I will be standing in line for a Blue Sea Systems, bus bar. It will be fed by the main ignition source wire and have all of the stuff on my Christmas Tree coil + terminated on it. It will also have the new wire gong down to the coil + via the 1.2 ohm resistor which will be the only wire directly attached to the coil +ve. (along with the EI +ve.) The coil -ve. will have the Tach. wire and the minus of the EI.
Will post photos as proof of my intended innocence asap.
The rigging job has gone well but been delayed by 20 - 30 MPH winds these last 3 days. All standing rigging is replaced, all bronze turnbuckles replaced with S/S and all running rigging being completed tomorrow (wind permitting). Also adding Lazy jacks, and 2 reefing lines for the mainsail, all new mast wiring and LED lighting, new Windex, new flag halyard on the Stbd spreader, and a new VHF antenna and wiring as well.
Ah well - It's only money !
Thanks, to everyone for the excellent help and guidance along the way (so far).
Gordon Foster

[Shrek]

Fingers crossed.

tomorrow will see the end of the new standing / running rigging job and also , hopefully the end of the premature shut down issues.

I used Neil's ballast resistor calculator for my EI and coil and the figures were as follows

Coil resistance with minus wires removed was between 2.9 to 3.1 ohms, so we averaged it out to 3.0 ohms.

Voltage in system at 1000 rpm was 13.77 volts
Voltage at cruising 2000 rpm was 13.86 volts.

When input to the calculator spreadsheet we arrived at 1.1 to 1.2 ohms ballast resistor requirement. The differences in the figures were due to instability in my multimeter's readings, but the different figures still arrive at basically the same value for the ballast resistor no matter what.

I have today removed the Christmas Tree wiring and installed a Blue Sea Systems Bus on the wall of the engine room to feed the circuits which were on the coil +ve. and then I ran a new purple wire from the bus bar through to the coil +ve via the resistor. The positive going to the EI is the only other wire on the coil +ve.
The coil negative side carries only the feed to the EI, and the tach wire.
Hopefully this will be the last of my issue. The engine started and ran fine at the dock - time will tell.
It did sound strangely smoother though. Perhaps a figment of my imagination ???
Gordon.

[hanleyclifford]

tomorrow will see the end of the new standing / running rigging job and also , hopefully the end of the premature shut down issues.

I used Neil's ballast resistor calculator for my EI and coil and the figures were as follows

Coil resistance with minus wires removed was between 2.9 to 3.1 ohms, so we averaged it out to 3.0 ohms.

Voltage in system at 1000 rpm was 13.77 volts
Voltage at cruising 2000 rpm was 13.86 volts.

When input to the calculator spreadsheet we arrived at 1.1 to 1.2 ohms ballast resistor requirement. The differences in the figures were due to instability in my multimeter's readings, but the different figures still arrive at basically the same value for the ballast resistor no matter what.

I have today removed the Christmas Tree wiring and installed a Blue Sea Systems Bus on the wall of the engine room to feed the circuits which were on the coil +ve. and then I ran a new purple wire from the bus bar through to the coil +ve via the resistor. The positive going to the EI is the only other wire on the coil +ve.
The coil negative side carries only the feed to the EI, and the tach wire.
Hopefully this will be the last of my issue. The engine started and ran fine at the dock - time will tell.
It did sound strangely smoother though. Perhaps a figment of my imagination ???
Gordon.

Are the voltages in that post taken at coil+, hot and running?

[Shrek]

Yes. As I said in my post first at 1000rpm and second at 2000 rpm to represent cruising approx.

[hanleyclifford]

FWIW

Yes. As I said in my post first at 1000rpm and second at 2000 rpm to represent cruising approx.

IMO those voltages are too high for coil+

[ndutton]

Hanley, before this goes too far, it was my interpretation that Gordon's voltage measurements were made to determine a suitable resistor for his system. That is, prior to installation of a resistor.

[hanleyclifford]

Hanley, before this goes too far, it was my interpretation that Gordon's voltage measurements were made to determine a suitable resistor for his system. That is, prior to installation of a resistor.

If that is so, then mea big time culpa.

[Shrek]

Neil is on his game !

Hi Neil - this is becoming confusing, following Cliffords post.

Have I done this correctly - please see my previous 2 posts re. calculations and the new bus bar and resistor location.

I will be making a 5 hour journey on Sat. morning to try and see if this has worked or not.

Is there a further test I can do by measuring at the coil +ve. now that the resistor is in place?

Thanks Neil for your most valuable input.

Gordon Foster aka Shrek.

[hanleyclifford]

Hi Neil - this is becoming confusing, following Cliffords post.

Have I done this correctly - please see my previous 2 posts re. calculations and the new bus bar and resistor location.

I will be making a 5 hour journey on Sat. morning to try and see if this has worked or not.

Is there a further test I can do by measuring at the coil +ve. now that the resistor is in place?

Thanks Neil for your most valuable input.

Gordon Foster aka Shrek.

Round about hour 3 of the journey put your hand on the coil body while underway, very carefully at first - just in case.

[ndutton]

Gordon, it looks to me like you've followed the proven protocol to the letter and with your report that the coil in place has never experienced a shut down I have every confidence you'll have a successful trip free from coil overheating and failure.

Hanley will admit he has never agreed with the work and remedy we developed in 2011 so he has come up with his own solution. Frankly, you'll have to choose one or the other, trying to accommodate both is a sure road to confusion.

[Shrek]

Always happy to hear some input.

Your comment did reaffirm that my original voltages were too high.
so I hope this resistor will be the end of my issues - We'll find out this Saturday perhaps.

[Shrek]

Thanks to all who replied this evening

I will post a follow up report with the result - Probably on Sunday !
GF