Boats For Sale:
1990 SN Fuel Starved |
Post Reply 
|
| Author | |
astinespring 
Groupie 
Joined: October-10-2013 Location: Orlando Status: Offline Points: 42 |
 Post Options
 Thanks(0)
 Quote Reply
 Topic: 1990 SN Fuel StarvedPosted: July-12-2014 at 3:48pm |
|
my 1990 ski nautique with the PCM 351 is cranking and idling normally, but when we gun it, as if to pull a slalom skier out of the water, it just dies. You can hear the carb trying to pull a lot of air in, and it seems like there just isn't enough fuel to support what you're trying to do. We have just replaced the fuel filter/separator, thinking that was our issue, but apparently not. Just to clarify, the carburetor IS getting fuel. Help?
|
|
 |
|
|
Bri892001
Grand Poobah 
Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
Quote Reply
Posted: July-12-2014 at 4:39pm |
|
What if you ease it up to higher speeds. Will it be able to hold the higher speed?
|
|
|
|
|
astinespring
Groupie
Joined: October-10-2013 Location: Orlando Status: Offline Points: 42 |
Post Options
Thanks(0)
Quote Reply
Posted: July-12-2014 at 4:47pm |
|
Yes it is holding the speed in a fake lake situtation, not sure with a skier behind.
|
|
|
|
|
Bri892001
Grand Poobah
Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
Quote Reply
Posted: July-12-2014 at 5:22pm |
|
Hmmm... You'd have to see if it would hold the speed under load; like cruising in the water.
Wouldn't necessarily have to be with a skier. I'm just trying to figure out if it's just an accelerator pump issue, or a fuel flow/restriction issue. |
|
|
|
|
65 'cuda
Platinum Member 
Joined: July-12-2005 Location: Cincinnati, OH Status: Offline Points: 1091 |
Post Options
Thanks(0)
Quote Reply
Posted: July-12-2014 at 5:51pm |
|
Pump,
|
|
|
|
|
calebcl
Newbie 
Joined: May-02-2013 Location: Orlando, FL Status: Offline Points: 26 |
Post Options
Thanks(0)
Quote Reply
Posted: July-12-2014 at 6:28pm |
|
Co-Owner of that 90 ski here...last time the boat was on the water, it wouldn't die at full throttle while pulling a skier, but would die shortly after slowing back down to idle; as well as being starved when you gun it. What are the symptoms of the accelerator pump being bad?
|
|
|
Caleb
|
|
|
|
|
quinner
Grand Poobah
Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
Post Options
Thanks(0)
Quote Reply
Posted: July-14-2014 at 2:50pm |
|
I would start by removing and inspecting the anti-siphon valve, if it's clogged up and restricted it will starve the fuel flow.
|
|
|
|
|
SNobsessed
Grand Poobah
Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
Post Options
Thanks(0)
Quote Reply
Posted: July-14-2014 at 7:55pm |
|
After that, try running boat with gas cap loose. It's rare, but the vent hose can get clogged.
|
|
|
“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
|
|
|
|
ezim
Newbie
Joined: May-19-2008 Location: United States Status: Offline Points: 12 |
Post Options
Thanks(0)
Quote Reply
Posted: August-01-2014 at 1:10am |
|
If you haven't fixed problem, check fuel pickup tube in gas tank. Take apart and check the two screens at top of pick up tube. They get clog with debris.
|
|
|
|
|
1987don
Newbie
Joined: July-08-2014 Location: derry nh Status: Offline Points: 11 |
Post Options
Thanks(0)
Quote Reply
Posted: August-05-2014 at 1:00am |
|
had similar issue last year with my 87 sn ...fuel line was collapsing from being ruined by ethanol in the gas. I replaced the line from the top of the tank to the fuel ands water separator and then from there to the carb...problem solved
|
|
|
|
|
Post Reply
|
|
Tweet
|
| Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
Topic Options