Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Fuel System

Reply
 
Thread Tools Display Modes
  #1   IP: 104.249.229.37
Old 01-20-2018, 08:15 PM
Jimmy Jimmy is offline
Senior Member
 
Join Date: Aug 2011
Location: London Ontario
Posts: 128
Thanks: 3
Thanked 15 Times in 5 Posts
OPSS Switch question

Greetings - a couple questions as I upgrade to a electric fuel pump (working with the MM conversion kit)

1) the brass plug I need to remove to install the OPSS is giving me grief. Instead of fighting this any longer, I got a bright idea.....wondering if I can add the OPSS to the same outlet as the Oil Pressure sending unit. To avoid any extreme torque on that location, I would use a “AN” fitting, and remotely mound the sending unit and OPSS. Any reason this won’t work?

2) I am adding a fuel shutoff solenoid. Any reason I can’t power this off the coil “+” terminal ? Turn off the engine, solenoid closes. This is over and above the valve on top of the tank.

As always, I value, and appreciate the input of this group.

Cheers
Jimmy
__________________

Jimmy
C&C 29 MK1
Erieau , Lake Erie
Reply With Quote
  #2   IP: 99.30.185.198
Old 01-20-2018, 08:47 PM
thatch thatch is offline
Afourian MVP
 
Join Date: Dec 2009
Location: Santa clarita, Ca.
Posts: 1,079
Thanks: 235
Thanked 257 Times in 138 Posts
Jimmy, I have made a similar change and it is perfectly acceptable. Mine is made up using AN fittings and stainless braid hose. In my case I'm feeding four units, the OPSS, two oil pressure gauges and a Cole Hersee low oil pressure alarm.
Tom
Reply With Quote
  #3   IP: 24.152.132.65
Old 01-20-2018, 08:49 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
1) That's how mine is, oil pressure actuated sender/switches mounted on a bulkhead, connected to the engine with 300psi oil rated hose. Be sure to run a ground wire to the sender array, the oil pressure gauge won't work without it.

2) Yes, you can power the solenoid shutoff from coil + with this advisement: to do it right, as you add load to the ignition circuit (this valve and the new electric fuel pump) you should measure the voltage at all components on the circuit. You don't want voltages lower than 3% of the source which for the engine circuit is the alternator. Voltage measurements below 3% indicate the entire ignition wiring circuit needs bigger wire. We have a voltage drop calculator on the USCG/ABYC Standards forum category.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #4   IP: 104.249.229.37
Old 01-20-2018, 09:50 PM
Jimmy Jimmy is offline
Senior Member
 
Join Date: Aug 2011
Location: London Ontario
Posts: 128
Thanks: 3
Thanked 15 Times in 5 Posts
One more question...

Thanks for the feedback guys. Last piece to this mini refit, is to relocate the coil, on a bulkhead. Like the idea of cooler ‘smoother environment. In doing so, I will need to increase ( replace with longer )the length of the coil wire that runs between coil and distributer cap. Any pit falls?

Again, Tnx

Cheers
Jimmy
__________________

Jimmy
C&C 29 MK1
Erieau , Lake Erie
Reply With Quote
  #5   IP: 24.152.132.65
Old 01-21-2018, 12:04 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
No pit falls with coil relocation, rock on. It would be interesting to get some IR temp readings of the coil before and after relocation to compare.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #6   IP: 104.249.229.37
Old 01-21-2018, 08:45 PM
Jimmy Jimmy is offline
Senior Member
 
Join Date: Aug 2011
Location: London Ontario
Posts: 128
Thanks: 3
Thanked 15 Times in 5 Posts
Future coil temp comparison

Thanks for the info.....
I will prep the A4 for a coil relocation, but not actually move it until after launch, around last week of April. I have a IR temp gun, so readings should be very accurate.

Cheers
Jimmy
__________________

Jimmy
C&C 29 MK1
Erieau , Lake Erie
Reply With Quote
  #7   IP: 24.152.132.65
Old 01-21-2018, 08:54 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
Great! Please mark a target on the coil so you are reading the same spot.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
The Following User Says Thank You to ndutton For This Useful Post:
Dave Neptune (01-25-2018)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
How much voltage drop at Starter while cranking? JackConnick Ignition System 67 07-13-2014 01:03 PM
Another stupid electrical question: Batt switch to off :o toddster Electrical 11 11-27-2013 09:38 AM
Master Switch question Robert Suda Introductions 1 07-07-2013 01:38 PM
Battery Switch Question Loki9 Electrical 3 04-21-2012 04:55 PM
Wiring spaghetti ndutton Electrical 35 09-07-2011 06:18 AM


All times are GMT -4. The time now is 07:33 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved