200 Black Max Low Water Pressure

[TNRoostertail]

Well we got 200 black max on the gambler. We installed a new water pump kit and everything sealed and bolted up like it was supposed too. For some reason the pisser isn't doing much at idle and upper rpms are just bringing 5psi. It was like this before the install, I thought a new water pump would remedy it. Need help lol, thanks guys

[TNRoostertail]

Also just noticed alot of water coming g out of the upper 2 exhaust ports on the mid. Idk if that helps diagnostics

[Merc 2.5]

Did u check poppet? I'd just replace it and test stats , if that don't do it gonna have to pull powerhead and clean adapter plates

[TNRoostertail]

Will check that, thanks Merc

[TNRoostertail]

Ok so we took the poppet valve off to see if there were any flow coming through to the power head. We ran the motor for less than 10 seconds and there was a decent stream of water coming from the rear hole where the poppet valve was. I wouldn't say it was shooting out just a decent stream. There was still water blowing out the upper 2 exhaust holes though. Then put the valve cover back in without the valve to see if it helped. It seemed to help some so we decided to look at the thermostats. It doesn't have any t stats in it, but that wouldn't affect flow to the gauge or the pee tube would it? The pee tube is just dribbling at idle and at 3k rpms just has the idle stream imo. Thanks guys.

[Merc 2.5]

For it to work correct and build pressure it needs the valve and stats only other thing to do is check adapter plates for a clog but that usually cause a spike n pressure. I say clean it all real gud put it back and try again , u need new tho and stats. It's like fuel diaphragm. dont take much mess em up. Also check seal in block that poppet slides in

[Merc 2.5]

Ur not gonna get a great stream on hose either , mine pumps great but on hose stream ain't as strong

[99fxst99]

I used to run out of a shallow creek and would pick up small debris that would jam the poppet valve resulting in low water pressure.

[TNRoostertail]

Well after looking at what I think is the correct poppet valve kit Poppet Water Valve Kit R: 803062T1

I have determined that the poppet valve in this motor is very incomplete. Its missing the spring and other parts.

[Merc 2.5]

No spring? Thats a problem

[Motv18]

Also check the squeez part is in the pump. Since you mentioned replacing the pump. It changes the pump from centrifugal to positive displacement.

Also sound like an adapter gasket leak since mentioned the water out of the relief.

I think you should have more then 5psi with thermo out but not sure how far no springs would drop it or how big the water flowing from relief is since it can hold 12+ with the popet and temps open normally with springs in.

One problem at a time though

[TEXAS20225]

sounds like you have a motor with previous cooling problems stats gone poppet twerked on . in experience is a killer on outboards did u just get this motor

[TNRoostertail]

Yeah Tex we needed something to run on the gambler while we build the promax back up. We lake tested it and also ran compression test. It just doesnt have enough water pressure.

[TNRoostertail]

What temp stat should we install? And tex I see your point on possible troubles. But if it's a low water pressure issue I would think it has to be fairly simple (I'm not as good as you guys so dont roast me lol) as this isn't a radiant type cooling system. Were not getting any spikes do to a leak down on a cylinder.

[Merc 2.5]

Stats 143. poppet can cause low pressure. especially with no guts in it. I think tex was getting at , what made previous owner start screwin with the system? Was it over heating so he tried this and that. then maybe sold it