Return to the home page...

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

Reply
 
Thread Tools Display Modes
  #26   IP: 72.194.220.204
Old 06-12-2018, 11:23 AM
JOHN COOKSON JOHN COOKSON is offline
Afourian MVP
 
Join Date: Nov 2008
Posts: 2,901
Thanks: 33
Thanked 444 Times in 348 Posts
Quote:
Originally Posted by smosh View Post
Basically, at this point the new electric fuel pump is not receiving power from the ignition coil. It will operate when connected directly to the battery. I bypassed the 'new' wiring, fuse, and OPSS with a test lead, connecting the pump directly to the positive of the ignition coil, does not work.
il?
If you don't have a VOM (volt ohm meter) or the equivalent you will need to buy or acquire one.
Step 1: Can you read "12 volts" at coil + when the ignition switch\key is in the on position?
Step 2: With the wire to the OPSS\fuel pump connected to coil + can you read 12 volts at the distal (OPSS) end when the switch\key is on?
Remember: The OPSS will not pass electricity to the fuel pump until the engine starts and the oil pressure is up.

TRUE GRIT
Reply With Quote
  #27   IP: 138.207.172.243
Old 06-12-2018, 12:01 PM
TomG's Avatar
TomG TomG is offline
Afourian MVP
 
Join Date: Nov 2010
Location: Kent Island, MD
Posts: 631
Thanks: 54
Thanked 71 Times in 37 Posts
This is very puzzling.

You have a spark, so we know you have power to the coil, yet the pump isn't working with the OPSS bypassed, but DOES work connected straight to the battery.

I'd definitely do as John suggests and check voltage at the coil. If you have 12ish volts at the coil, you should have enough oomph to run the pump (unless internal wire corrosion/wire size has created a significant voltage drop?)

Hopefully the smart kids will have some more ideas. I'm very curious what your coil voltage is.
__________________
Tom
"Patina"
1977 Tartan 30
Repowered with MMI A-4 2008
Reply With Quote
  #28   IP: 108.45.44.91
Old 06-12-2018, 12:54 PM
edwardc's Avatar
edwardc edwardc is offline
Afourian MVP
 
Join Date: Aug 2009
Location: Laurel, MD
Posts: 2,033
Thanks: 39
Thanked 191 Times in 137 Posts
If its a Facet fuel pump, another possibility is the (infamous) "stuck ball" problem. The Facet has an internal ball and spring check valve. For some as-yet unknown reason, this ball can become partially or fully "stuck" to its seat when left unused for a longish time.

In the partially stuck position, a small amount of fuel gets by, enough to start and run at idle for quite a while, but quickly dies at higher throttle. In the fully stuck position, it won't even start once the float bowl runs dry.

This spring, I had this happen again at spring commissioning. It's the third time, on two separate Facet pumps, over the course of 8 years.

Fortunately, the diagnostic and short-term fix is quite simple. The bottom of the pump is a bayonet-style twist-off, with a 15/16" nut-shaped boss. Once removed (have a container ready to catch the gas), the bottom of the check valve ball is accessible. Simply press on it gently with a fingertip. It should move up smoothly. If its stuck, a little more force will cause it to break free with a perceptible "click" and then operate smoothly.

Unfortunately, my experience has been that once it starts to stick, it will do so again, the only long-term fix being a new pump.
__________________
@(^.^)@ Ed
1977 Pearson P-323 "Dolce Vita"
with rebuilt Atomic-4

Reply With Quote
  #29   IP: 72.194.220.204
Old 06-12-2018, 02:34 PM
JOHN COOKSON JOHN COOKSON is offline
Afourian MVP
 
Join Date: Nov 2008
Posts: 2,901
Thanks: 33
Thanked 444 Times in 348 Posts
Quote:
Originally Posted by TomG View Post
I'd definitely do as John suggests and check voltage at the coil. If you have 12ish volts at the coil, you should have enough oomph to run the pump (unless internal wire corrosion/wire size has created a significant voltage drop?)
coil voltage is.
My best guess at the moment is that the fuse is blown or not making contact inside the holder. I can only guess because I'm sitting in front of computer, not on the boat and not doing any diagnostics myself..........


TRUE GRIT
Reply With Quote
  #30   IP: 67.244.39.117
Old 06-13-2018, 11:10 AM
smosh smosh is offline
Senior Member
 
Join Date: Apr 2018
Location: Cape Elizabeth, ME
Posts: 18
Thanks: 1
Thanked 0 Times in 0 Posts
I will measure coil voltage. I believe we did that this past weekend, but i can't say 100% for sure what it was. (i was up in the cockpit with the key)

To measure the voltage at the coil, positive lead on the tester on the coil +, and negative tester lead grounded to the block, or to the negative on the coil?

John, completely bypassing the fuse and 'new' wiring, still doesn't work. The fuse looks ok anyway, and i had initially made sure it was seated and all connections to the new Facet were good...new connectors, good crimp, etc.

I hope to get out to the boat this afternoon to test it out.
__________________
1971 Tartan 30
No name yet!...but it will be Euphoria. I think.
Reply With Quote
  #31   IP: 174.192.26.200
Old 06-14-2018, 03:24 PM
smosh smosh is offline
Senior Member
 
Join Date: Apr 2018
Location: Cape Elizabeth, ME
Posts: 18
Thanks: 1
Thanked 0 Times in 0 Posts
Zero volts at the coil. Noooooooo...
__________________
1971 Tartan 30
No name yet!...but it will be Euphoria. I think.
Reply With Quote
  #32   IP: 138.207.172.243
Old 06-14-2018, 05:22 PM
TomG's Avatar
TomG TomG is offline
Afourian MVP
 
Join Date: Nov 2010
Location: Kent Island, MD
Posts: 631
Thanks: 54
Thanked 71 Times in 37 Posts
Quote:
Originally Posted by smosh View Post
Zero volts at the coil. Noooooooo...
That explains a lot.

This is good in a way. Now you know where to look to solve the problem!
__________________
Tom
"Patina"
1977 Tartan 30
Repowered with MMI A-4 2008
Reply With Quote
  #33   IP: 72.194.220.204
Old 06-14-2018, 05:40 PM
JOHN COOKSON JOHN COOKSON is offline
Afourian MVP
 
Join Date: Nov 2008
Posts: 2,901
Thanks: 33
Thanked 444 Times in 348 Posts
Quote:
Originally Posted by smosh View Post
Zero volts at the coil. Noooooooo...
Next you will need to check the voltage at the terminal on the key\switch that supplies electricity to the coil when it is in the on position. Probably a purple wire.
While taking the reading tap on the key\switch with a screwdriver handle to see if there is there is an intermediate connection inside it.
This way you will know it the problem is with the key\switch or the wiring.
We're getting closer.

TRUE GRIT
Reply With Quote
Reply

Tags
Facet, Stuck Ball

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
Got the engine Started! Now to trouble shoot odd running patterns LemonShark2 Troubleshooting 17 03-26-2016 02:00 PM
Running Rough. Misfiring and Running Rich Gabe Troubleshooting 8 08-26-2013 03:07 PM
Hand starting ndutton General Interest 25 12-04-2012 11:50 AM
starting problem gary randall Troubleshooting 4 10-26-2010 12:53 PM
Hard Starting after warmup, and intermittent low power in gear jkenan Troubleshooting 7 06-15-2010 08:35 AM


All times are GMT -4. The time now is 08:03 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2018 Moyer Marine Inc.

All Rights Reserved