Can you check the top hat seal without taking the vst apart. loosing fuel pressure after pump shuts off goes from 39 to 0 merc 200 sn# ot144927
Can you check the top hat seal without taking the vst apart. loosing fuel pressure after pump shuts off goes from 39 to 0 merc 200 sn# ot144927
Last edited by 2bassinbob; 04-16-2019 at 11:29 AM.
that ser num doesn't have top hat filter,filter is connected to bottom of pump in vst,not gona be your problem, how long before it goes to 0, possible leak in inj housing, or inj stuck open, just fixed one today inj stuck wide open
.................................................. ...the scariest thing in life is the unknown ...................................
As soon as the pump turns off it drops to 0
Last edited by 2bassinbob; 04-13-2019 at 07:54 PM.
It is a 2000 200 efi it bogs down when I take off Idles good wide open is good.
How can I tell which Inj is leaking.
remove front of inj housing key up and yoll see leak if there is one, be very careful working with fuel inj with batt connected
.................................................. ...the scariest thing in life is the unknown ...................................
Ok thanks Joe will take it apart today.
That serial number comes back as a carbed mariner 135?
1999 ProGator 190V
200 Mercury EFI 0G843298
My eyes are getting old. new sn# ot144927 Thanks Hauton
Did you ever figure out your fuel pressure problem? My 2000 200hp is doing the same thing, it looses pressure immediately after I turn the key off. It idles a little rough and runs top end rpms but bogs down when I try to come out of the hole.Originally Posted by 2bassinbob
You can check pretty easily if you verify no other leaks (rail, rail o-rings, Pressure Regulator, etc).
If you have a pressure tester, it could be connected to the fuel OUTLET nipple and you could then pressurize the nipple with your TESTER to see if the pump holds pressure (it would jump to the VST vent if the Top-Hat seal leaks).
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