Can my popit valve be stuck open water is pouring out the exhaust and when the motor pees it does very little on the hose does the water pressure gauge suppost to have water pressure when on the hose thanks. My motor is a xr2 150
Modified by dirtracer81 at 2:03 AM 3/13/2012
You should have 2-4 psi water pressure at idle (minimum).
It is indeed possible that the poppet valve is sticking or leaking.... also possible is a thermostat problem (on this engine, there should be very little or NO telltale stream until the engine has warmed up to operating temp - or approximately 143 degrees).
Telltale stream is supplied from the THERMOSTATS.
When chasing down water pressure and cooling system problems, ALWAYS, ALWAYS start at the SOURCE: The Water Pump. ONLY after complete pump replacement is it appropriate to continue to other potential causes (thermostats, poppet valve, gaskets, etc).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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Its got a new water pump new thermostate the popit is the only thing left to change the motor is just coming off breakin. U can tell when the thermostate opens up I don't have any pressure on the hose and wot its running 12 or 14 psi
Poppet valve would be the next, logical item to check/replace.
Be sure to verify the SEAT is firmly retained in the block (and not loose/sliding in and out).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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The valve was pretty dirty and look like water scale stuck on it I'm going to replace it Monday. Then run it thanks
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Ok I got the poppet valve in started the motor no water pressure on gauge the motor is peeing but not that strong and u can tell when the thermostates open that's when it pees right oh and water is still coming out the prop as soon as I start it man any gess thanks
Oh last fall I had the water pump replaced the gasket that goes to the lower unit was leakin water was going in that lower unit could this gasket be leakin again will this cause low water pressure I havet took the boat to the lake yet it will be Friday thanks any help
I had an issue with water pouring out of the exhaust port last season on my 1990 Mercury 175. I replaced the complete water pump assemble, thermostats and poppet valve to no avail. My water pressure was weak, reading out a couple of psi below the recommended range. My solution was to finally pull the powerhead and check the gaskets between it and the midsection. In my case the gasket below the exhaust plate had deteriorated allowing water on its way up to the engine to exit out of the exhaust port prematurely.
<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by richap »</td></tr><tr><td class="quote">I had an issue with water pouring out of the exhaust port last season on my 1990 Mercury 175. I replaced the complete water pump assemble, thermostats and poppet valve to no avail. My water pressure was weak, reading out a couple of psi below the recommended range. My solution was to finally pull the powerhead and check the gaskets between it and the midsection. In my case the gasket below the exhaust plate had deteriorated allowing water on its way up to the engine to exit out of the exhaust port prematurely.</td></tr></table>
This does (and can) happen. In some cases, you MAY be able to look up through the exhaust tuner (with gearcase removed) and see the gasket "hooched" out into the exhaust cavity (but NOT in every case).
Also- ANY of the water pump gaskets that have cracked, split, or torn can cause a lowered water pressure (ESPECIALLY the gasket BELOW the impeller plate, or below the water pump base).
Water exits through the prop ALL the time... that part is perfectly normal.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Hello I cheaked the lower unit it had water in the oil so the seal is bad will this cause low water pressure I had this seal replaced last fall and the tech said he had a hard time putting it in and when I tried to start the motor at the lake after getting it back it seemed like it was dragin and would hardly turn over then it like broke free and started could the seal be in a bind thanks
Seals usually do NOT affect water pressure, UNLESS they are allowing gear lube to leak into the water pump.
Seals also seldom cause "binding". Much more likely is that the leaking seal allow water in, which caused DAMAGE to one or more bearings, gears, etc.
Strongly suggest obtaining the "Hands-On Assistance" of a Certified or Master Technician.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
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