Issue with 2000 300 Pro max

[wannabee]

The tell tale on the port motor has gone weak. There is water running down the outside of the lower shroud at idle although water pressure gauge is showing 5 psi. Coming in from fishing the other day (at 4500 rpm) motor stumbled twice and there was a beep. I think it was trying to tell me overheat?

Can I have a leak in the water supply line and how tough is it to pull the lower shroud off these motors? Boat is in a lift.....

I took a video but it won't load.

Took upper cover off and started motor- no visible leaks at powerhead.

This is the same motor we replaced fuel pump on.... We have nicknamed port motor Clyde.....:cool:

Thanks guys.

[wannabee]

OK painted up a Diagram. Yellow area is where water is coming down///

[vnemous]

Check the diaphragm on your poppet. When it ruptures you will have a leak there but usually the motor wont warm up. If its an alien cowl you have to take the skirt off. Easy job.

[wannabee]

Where is the poppet on these motors.

If you see where the diagram is there is no water leaking at the motor. I suspect the waterr supply line coming up from the LU.

How hard is the skirt to remove? 4 bolts? I am mechanically inclined so thats not the issue- hanging off the back of a Donzi 35 ZF is NOT EASY>

Thanks-

[vnemous]

6 if they are all there. Starboard side under skirt.

[vnemous]

386616

[vnemous]

386617

[wannabee]

Could be from debris too. We have lots of weeds in the canal.

[kct11]

Check the tell tail hose for a pebble or weeds.

[wannabee]

We have. I think the poppet is gone.... either diaphram or ?

[Capt.Insane-o]

Have your wife blow out the pee hole.

[Da Bull]

My guess is that your powerhead base gasket is blown. #4 in first diagram. Those motors have been bad about that. Mine blew several. Even torque is the key.

[wannabee]

So can I check the Poppet by taking the collar #48 off? Is it just some screws?

[vnemous]

Yes it is 6 I believe 1/4-20 screws. Locate poppet cover, remove two more screws and check diaphragm. While your there replace it anyway and the two gaskets. JMO

[wannabee]

Where do I find these? Finding a fuel pump was very tough!!!! Is this part common across several motors? Venemous if you have part #'s that would be great. Thanks

[hydroo]

Take a piece of thin wire. Stiff leader material for fishing and ream out pee hole. Do this first its easy.

The temp should go up and down when you run the motor on a hose, this will confirm popit valve is working.
it moves about every 40 seconds.

[wannabee]

No temp gauge, but I do have water pressure gauge.

[vnemous]

My diagnosis on poppet is based on his comment that water is coming out from under starboard side of skirt. On a normal cowl when the poppet goes water will exit thru the two tubes in rear of exhaust plate. Not so with alien cowl. Over heat may be unrelated but if poppet was never serviced a bet thermostats were not either. Any history on cooling system service on your motor? Water pump, thermostats and poppet?