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250 efi with o2 sensor and 250 carb running problems

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boatman2007

New member
"the engine runs wot for like

"the engine runs wot for like 10 secs then falls flat on it's face. i put a fuel pressure gauge on after the vst and b4 the fuel rail and it read 35 psi. i need help asap!! i also have a 250 carb, it idles fine but wont go wot(i cant achieve full power)?? please help the primer bulbs are fine.

symptoms
efi-runs for like 10secs then loses power, surging during idling

carb-wont get full power. idles fine but wont give my the power it suppose to have."
 
Check your sensor. I had simil

Check your sensor. I had similar issue with my '05 SX200. When the O2sensor was replaced I was back in business.
 
"I suspect that both might hav

"I suspect that both might have bad fuel pumps. Mine had identical symptoms. What year engines? Around 2002, they changed to black diaphrams in the pumps. The ones prior (white diaphrams) need to be replaced. They are only $30 each (need three), and easy to change. Make sure to order gaskets too. Order through www.boats.net"
 
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