Ghostshad Posted June 10, 2023 Share Posted June 10, 2023 I think this is what you call it. i started my boat today & it wasn't putting water out in that spot where water comes out.I'm talking about that stream of water that comes out of the back of the motor.My brother said that it takes a minute to come out that it has to get hot & open the hole up. Is that right i turned my motor off i was afraid id hurt my motor? Any help will be appreciated. Quote Link to comment Share on other sites More sharing options...
Super User MN Fisher Posted June 10, 2023 Super User Share Posted June 10, 2023 It's not the hole that opens up - just like your car, a water-cooled boat motor has a thermostat. When the engine reaches normal operating temperature, the thermostat opens allowing water to circulate through the cooling system. So yes, the motor has to warm up before you'll see it 'peeing'. 2 Quote Link to comment Share on other sites More sharing options...
Super User GreenPig Posted June 10, 2023 Super User Share Posted June 10, 2023 Or your impeller could look like this, instead of this. 2 3 Quote Link to comment Share on other sites More sharing options...
Susky River Rat Posted June 10, 2023 Share Posted June 10, 2023 Most have a thermostat. Look when you are under power to make sure it is pushing hard. Also most boats have an alarm that will sound if you are over heating. You could also flush your cooling system. I try to do that every two months. Mud and other debris can build up. Quote Link to comment Share on other sites More sharing options...
Super User Log Catcher Posted June 10, 2023 Super User Share Posted June 10, 2023 Get a set of muffs for the motor and hooks up to a water hose. Straighten out a paper clip and work it around in the hole. I solved this same problem with mine a couple of times doing this. If this doesn't work then you probably need to replace your water pump. 1 Quote Link to comment Share on other sites More sharing options...
dave Posted June 11, 2023 Share Posted June 11, 2023 Especially when first getting the boat out, some type of insect has crawled it and blocked the line up with their larve. 1 Quote Link to comment Share on other sites More sharing options...
airshot Posted June 11, 2023 Share Posted June 11, 2023 That telltale hose can get clogged from wasps, debris most anything. Find a long skinny wire, or something to check that there is no blockage. Sometimes you need to up the rpm a little to get the water flowing, if no pee after 5 minutes on a cold engine then look at the pump impellor. Quote Link to comment Share on other sites More sharing options...
Super User Way2slow Posted June 11, 2023 Super User Share Posted June 11, 2023 I think Pee Hole or Pisser is the most common terms used but it's actually the visual indicator. Depending on the make and size motor, there can be a delay, but probably not a minute. Larger motors hold several gallons of water in the exhaust chest part of the block and it has to fill with water before it start coming out that hole. Whether or not the thermostat is open has little affect on how long it takes. It only prevents water from leaving the block, that hole is ported before the thermostat. There are air bleed holes cast into the block so trapped air can't prevent the block from filling with water. As mentioned, Dirt Dobers love ready-made holes to lay their eggs and if you don't keep something stuck in in when parked, they will plug it. Your water pressure gauge should be your main indicator. If you don't have one and your boat is large enough to have a console, you should add one. Water pressure gauge, tachometer and voltmeter (to make sure it's charging) are three must have gauges on any boat as far as I'm concerned, and on a pontoon boat or boat you can't see the motor/midsection, a trim indicator. 1 1 Quote Link to comment Share on other sites More sharing options...
Global Moderator TnRiver46 Posted June 11, 2023 Global Moderator Share Posted June 11, 2023 Poke it out with weedeater string. If it’s still not peeing there’s a problem somewhere else. Usually it’s something like what @GreenPig posted, but I had a different problem. Mine would only pee with some throttle, it would stop at idle speed and start beeping. I got a new impeller and had a buddy help me install. The old impeller was in perfect shape. The problem was the small intake tube was slightly askew. It’s hard to line it up just right when re installing the lower unit, especially if only one person is doing it Quote Link to comment Share on other sites More sharing options...
ike8120 Posted June 11, 2023 Share Posted June 11, 2023 If you never have changed the impeller it may be time to do so. Especially if you have run through some muck. Quote Link to comment Share on other sites More sharing options...
Fishin Dad Posted June 11, 2023 Share Posted June 11, 2023 Also make sure your intake screen is not plugged up. I have had that happen when driving through a lot of weeds. It usually clears itself, but I have had my alarm go off while driving through vegetation. I stopped and lifted the motor. Weeds had sucked up to the intake. I cleared it, let it cool down and was good to go. Quote Link to comment Share on other sites More sharing options...
Super User TOXIC Posted June 11, 2023 Super User Share Posted June 11, 2023 Every time I park the boat at home, I put a cable tie in the pee hole all the way to the end. I have a 250 Yamaha HPDI and it will not pee well on muffs at all. As soon as it gets submerged, it’s fine. It has had multiple impeller/water pump/poppit valve/ thermostat replacements over the years and it’s always been a very low water psi at idle, it jumps to 35 when running and yes I’ve replaced the gauge over the years as well. Yamahas, so I am told, work more on volume than pressure. It’s got 500 hours so I don’t worry about it. Quote Link to comment Share on other sites More sharing options...
Super User Way2slow Posted June 11, 2023 Super User Share Posted June 11, 2023 It's important an engine is not running below the recommended minimum water pressure. It's easy to do if it's too high, especially in turns or worn water pumps.. If you start playing with engine height, a pressure gauge is a must. Most all water-cooled engines require a pressurized cooling system to prevent hot spot from forming. (pressure raises the boiling point of water) These will create steam and push the water out of the block. I don't know what the four stroke motors require but the two strokes were usually 10 to 16 psi. Yamaha and Mercury were usually on the lower end of that and the old OMC's were on the higher end of that. The alarm doesn't go off until it's already hot. the gauge can let you catch it before that. Things happen, like one time I was cruising along at 4,500 rpm and noticed my water pressure was zero. I immediately stopped and raised the motor. A frigging loaf bread wrapper someone had thrown away had wrapped around the lower unit and blocked off the intake ports on both sides of the motor. One thing I should mention. Letting a motor sit for long periods of not being used is actually more damaging to the water pump than regular use. The rubber hardens and develops a memory, so it doesn't flex out against the wall of the pump as firm as it should to maintain good pressure. Three years is about as long as you should run one. 2 Quote Link to comment Share on other sites More sharing options...
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