Mercury V6 outboard poppet valve kit for Mercury, Mariner and Force engines. OEM: 803062T1. Mercury 150 V-6 Serial # 1B009782. I need to replace the poppet valve. Engine will not warm up at idle. New thermostats were installed.
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AuthorTopic: Poppet valve kit replacement on Mercurypicflightposted 12:01 PM ET (US) 1998 Mercury 150 EFI 2.5L V6 Off-ShoreI rebuilt the poppet valve on my engine 6 months ago using the widely available rebuild kit, replaced the thermostats and impeller. Engine has been dry docked since then.Today when I installed the lower unit and ran the engine on the muffs, I noticed a steady stream on water coming from the body of the poppet valve.
Seems to be coming out of a weep hole of some kind. This water was filling the lower cowling area of the engine. I tried to take a picture of the stream from the poppet valve but it does not seem to be very clear.This does not seem normal to me.Can someone confirm.Thanks.myakkaposted 09:20 PM ET (US) It is either perforated again or the pieces slipped during installation. Its been a while. I remember it being tricky to install without something slipping.picflightposted 05:56 PM ET (US) Actually it was not difficult to install, only time consuming part was holding the gasket and face plate together.It looks like a weep that was putting out the water.I forgot to lower the pressure of the water hose to see if the hose pressure was doing it.sosmercposted 05:58 PM ET (US) Either the diaphragm was not positioned quite right, or one of the gaskets. Water is NOT supposed to come out of that hole.
The hole is a vent hole to let air in on one side of the diaphragm.RevengeFamilyposted 07:50 AM ET (US) sosmerc is dead on.I've replaced the assembly on my 1999 225hp Optimax's. Easiest way to do the job is to remove the lower cowling. This gives you plenty of space to see what your doing.Had a diaphragm tear when I was 10 miles off the beach one day.
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