Fuel vapor separator leaking Suzuki 115HP

timmyjane

Seaman
Joined
Jul 4, 2010
Messages
53
I have a 2014 DF115 with approximately 36 hours. The overflow from the fuel vapor separator is leaking.
I have taken it apart a half dozen times. If I blow through the fuel inlet the needle seats and I can not blow through it. Flip it over I can blow freely. It seems to be properly seating. I have adjusted the float height more and more.
It seems that there must be something else causing this overflow. Is there anything else in the system that would cause the bowl to fill and overflow that is somehow bypassing the float and needle?
In idle if I hold my thumb over the vent they the fuel is leaking from it builds pressure, seems to anyway on my last reassembly. After it leaked the last time I shut it down and decided to take a break. I’ve been working on this leak for 6 straight hours today. Time to try something different.
Thanks for the help.
 

timmyjane

Seaman
Joined
Jul 4, 2010
Messages
53
I took the fuel pump off and apart. I see why they use the security torx. Didn’t see anything so I put it back together and back on the boat.
Fired it up and the FVS is not leaking. Idk. Turned it off and on a few times and it seems to be ok. I’ll take it to the lake tomorrow and see how she runs.
 

timmyjane

Seaman
Joined
Jul 4, 2010
Messages
53
Still leaking. After unloading the boat it seemed to be ok. After a short ride we beached for a while. During the next ride the leak started back and it continued until I left the lake.
Any advice?
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
15,762
Check the condition of the low pressure fuel pump

Pretty common for a high pressure pump to vent to atmosphere when the low pressure pump is on the way out.

Can't build enough pressure to keep the vent valve shut
 
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