Go Back   Maxum Boat Owners Club - Forum > Maxum General > Engines
Click Here to Login
Register FAQ Community Calendar Today's Posts Log in

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-21-2022, 02:10 PM   #1
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default 2000 5.7 carb, no spark

i have a 2000 23SC with a carb. 5.7 Alpha One. No Spark
I have been doing a little reading trying to find the issue, so I will note a few observations that may help a knowledgable mechanic.
The Tack started acting strange a while back, it would be ok, then the needle would bounce all over. No affect on how the engine ran.
Recently the engine would have a slight sputter when throttling up to get on plane.
Last time out, it started right up and idled ok but the sputter was all of the time except idle.
I had never replaced the spin on fuel filter so I did this, as well as replaced the Distributer Cap, Rotor and plugs. Now no spark. I havent tested with a voltmeter yet....
__________________

spydermann22 is offline   Reply With Quote
Old 08-21-2022, 04:27 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,623
Default

How have you verified there is no spark? Could you have installed the wires in the wrong order? Did you verify the kill switch is in the run position?
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 08-23-2022, 03:00 AM   #3
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

Quote:
Originally Posted by mmwjr View Post
How have you verified there is no spark? Could you have installed the wires in the wrong order? Did you verify the kill switch is in the run position?
I verified that the wires to the cap are correct. I unplugged the throttle linkage microswitch and plugged the leads together (I didn't try with them not connected). Kill Switch is in run position. no spark from coil, old or new, tested cranking with a bolt leading from the wire to close to exhaust bolt. both coil leads have 12.5v to ground when the key is on. the coil has 14.5 ohlm resistance from the leads to the middle. This is 16.2 to the leads to the coil wire (2 more ohlms than without the wire. The Tach connection looked ok.
spydermann22 is offline   Reply With Quote
Old 08-23-2022, 03:07 AM   #4
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

I did come across a ground wire that is not connected but I can't remember removing it, hopefullythe pic uploads.
Attached Thumbnails
20220822_194021.jpg  
spydermann22 is offline   Reply With Quote
Old 08-23-2022, 02:30 PM   #5
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,623
Default

Use he troubleshooting guide in Mercruiser manual #24 under Documents.
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 08-24-2022, 03:26 AM   #6
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

Quote:
Originally Posted by mmwjr View Post
Use he troubleshooting guide in Mercruiser manual #24 under Documents.
So reading that the Distributor Sensor should have 1000 ohlms minimum, Lead to Lead. This one has 8.7
It looks much different than anything on line.
Any idea what the P/N is? Possibly Quicksilver 87-892150Q02...?
its a carburated model with the round base.
Attached Thumbnails
20220823_211744.jpg   20220823_211144.jpg  
spydermann22 is offline   Reply With Quote
Old 08-24-2022, 04:15 PM   #7
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,623
Default

I believe the two wire sensor has been replaced by a three wire one. Contact these folks for help.

https://www.mercruiserparts.com/merc...ookup-drawings
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 08-24-2022, 05:59 PM   #8
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

Thanks for your help Mike!
spydermann22 is offline   Reply With Quote
Old 08-28-2022, 02:43 PM   #9
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

That solved it, the ol' 5.7 purrs once again!
i took the ground wire and found a home for it on the intake.
Thanks for the help!
spydermann22 is offline   Reply With Quote
Old 08-29-2022, 12:48 AM   #10
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,623
Default

Quote:
Originally Posted by spydermann22 View Post
That solved it, the ol' 5.7 purrs once again!
i took the ground wire and found a home for it on the intake.
Thanks for the help!
So new ignition sensor; correct?
__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 08-29-2022, 03:43 AM   #11
Lieutenant
 
Join Date: Jul 2013
Location: Minneapolis
Posts: 56
Default

Yep, I think it was original so it made it 22 years.
Next project is the fuel Guage! I will start testing tomorrow
spydermann22 is offline   Reply With Quote
Old 08-29-2022, 03:36 PM   #12
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,623
Default

Quote:
Originally Posted by spydermann22 View Post
Yep, I think it was original so it made it 22 years.
Next project is the fuel Guage! I will start testing tomorrow
There’s always a project.
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 11:50 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.