Stalling after ideling for 10 mimiyes

J

joseph Westbrook

New Member
May 10, 2018
7
Boat Info
2009 290 SEA Ray sundeck
Engines
496
Boat runs great not a single miss. After ideling while backing the trailer it stalls and won't restart for 20 or 30 minutes. Replaced the water / fuel separator filter. Put 75 gallons of gas and SEA Foam and ran 25 gallons through and still stalling . Any advice is greatly appreciated.
 
Bt Doctur said:
Thats Great, didnt think a turbine would stall like that.

Without telling us what motors you have all we can do is guess at what could be wrong
Click to expand...

looks like an 09 290 w/496 from sig... fuel injected i presume... maybe just idle too low.?
 
Happy Dayz said:
looks like an 09 290 w/496 from sig... fuel injected i presume... maybe just idle too low.?
Click to expand...
She will idle for 30 minutes till cutting off. And recrank after 10 or 15 and then shut off after 20 or 22 minutes and still recrank after 10 or 15 minutes. At 2000 rpms the fuel pump feels cooler to the touch and at idle warmer. Thinking fuel pump? Fuel regulator if it has one. Maybe there's a safety cut off for the fuel if the fuel pump gets hot .
Replaced the filter already seemed to help top end speed but not the like
 
Bt Doctur said:
Thats Great, didnt think a turbine would stall like that.

Without telling us what motors you have all we can do is guess at what could be wrong
Click to expand...
Sorry about that. It's a 496 magnum fresh water cooled single engine on a 2009 290 SEA Ray sundeck . Thanks
 
When it doesn't start, Does it crank but not start, or is it unable to even crank?

If it cranks but doest start, you need to check for spark and fuel pressure with the "no start" condition.
 
Two sensors I'd inspect first. One the IAC. Just over the bellhousing. Easy to pull just have extra gaskets. See if its sticking and clean with carb cleaner. If that doesn't solve it then replace the crank shaft sensor. It's on top of the bellhousing near the harnesses. I just replaced mine after a month of simular gremlins. Solved the stalling issue. Be sure the o-ring is seated down tight before and during tightening of the 10mm bolt.

I have twin 8.1s and swapped sensors until the problem followed to the other motor.
The sensor failure was so fast that no codes could be stored.

The crank shaft sensor reads the fly wheel like morse code to the ECM. If it fails the ECM can read and fails to tell the spark to fire. Hence just dead like no fuel or spark.

Good luck.
 
It’s a 2009?
Do you have DTS?
If it’s got an electronic throttle (drive by wire) it probably doesn’t have an idle air control motor.
 
LG111 said:
Two sensors I'd inspect first. One the IAC. Just over the bellhousing. Easy to pull just have extra gaskets. See if its sticking and clean with carb cleaner. If that doesn't solve it then replace the crank shaft sensor. It's on top of the bellhousing near the harnesses. I just replaced mine after a month of simular gremlins. Solved the stalling issue. Be sure the o-ring is seated down tight before and during tightening of the 10mm bolt.

I have twin 8.1s and swapped sensors until the problem followed to the other motor.
The sensor failure was so fast that no codes could be stored.

The crank shaft sensor reads the fly wheel like morse code to the ECM. If it fails the ECM can read and fails to tell the spark to fire. Hence just dead like no fuel or spark.

Good luck.
Click to expand...
 
Thanks for your input and after reading more from other people it definitely sounds like the iac. I know the part.# number from the dealer and know what it looks like but I'm just that blind I guess. I can't find this thing and I looked over and over. You wouldn't happen to have a picture of the location would You? The part # is 862998 checked around the bell housing and tried to follow lines , I just don't want to undo something I can't redo. Thanks
 
Sits on the throttle body. take the plastic flame arrestor cover off. There's a little filter in there you should change as well.. Use a pair of needle nose pliers for that
 
IAC part # in Sierra is 18-7701.. Standard Motor Products # is AC 423.. The small filter is a Quicksilver product, only a few bucks.
If I recall , the 2 bolts that bolt it down are Torx head, # 40,
Standard part is $43 on Amazon . Sierra part is about $78 and up online.
I've used the Standard AC423 and had good success.
it really is a 5 minute fix.
 
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