25hp Merc 2 Question Stroke

[DRICH]

I had put a new water pump in this used motor I just bought. I put it on the muffs to run it. Not much water comes out the hole till it gets warm a bit then the water starts to flow better but not with any pressure like my 50hp I had. It says in the book that it has a theromstat and it may have droplets to full spray. I took the lower unit off to check that I had the copper tube stuck in where is should be. That looks ok.
I see more water coming out the side of the case where there is a hole. That one sprays good and water will come out around the shift rod where it comes through the lower case and you can see it from the out side. Once I shut the engine off and the hose water drains from the motor for a bit.
If anyone has a 2 stoke merc that they run on the muffs let me know how yours is. Thanks

[Phil T]

If water is escaping from wierd places, run it with the muffs without the cowling. Sounds like a leak somewhere under the cowling (broken hose?).

[Hot Runr Guy]

My 2003 9.9 2S is the same way, not much more than a dribble out of the tell-tale hose. I took the t-stat cover off, and the pee-hose flow area has just a small "notch" where the t-stat fits, so it really dosesn't see much flow & pressure until the thermostat opens. I replaced the thermostat & impeller, with no change. Remove the thermostat completely, lots of flow out of the pee-hose.
Not sure what to make of it.
HRG

[DRICH]

Do you ever run yours with the muffs on it? I was wondering if the water from the side hole is normal. Also do you get a hard stream of water or just a light running of the water? Thanks for the help

[Hot Runr Guy]

My 9.9 has the water intake on the bottom side of the cavitation plate, rather than "nostrils" on the sides. So, I can't use a set of muffs like you probably can. As a result, I just run it in a container full of water, so any side hole flow is not visible.
Sorry, HRG

[DRICH]

Thanks for the help. I'm thinking that maybe I'm ok. With a thermostate in it the pump would half to have a place to dump the extra water being pumped. Also the hose being on turned on it was probally to much water being forced in. Just a thought.

[ibew110]

I think your motor is fine. I have a 1996 merc 9.9 that i use as a kicker on my rig and when i first start it up when its cold very little water comes out. when i use it for back trolling the amount of watter that comes out varies a lot do to the thermostat opening and closing.When i use it to forward troll the thermostat stays open so a lot of water comes out. I have had this motor on my 17 foot boat for 12 years and it works the same to day as it did 12 years ago.