Help! 50 hp force over heating!

[jonesin]

No water is coming out of the exhaust holes and the over heating buzzer is sounding. I have changed the impeller and still no change. What can I do?

 

[imported_bowfisher]

Re: Help! 50 hp force over heating!

Did you get the water tube hooked up correctly when reassembling? Do you have any obstructions (Sand etc.) in the system? Is the drive key in the impeller?

 

[tater76]

Re: Help! 50 hp force over heating!

Bowfisher is right, check the pin/drive key on the shaft at the impeller. I know it is a pain in the butt to drop the lower again, but it's worth the headache. The driveshaft pin is tiny and can fall out, break, etc. The water tube is also subject to proper alignment, I have been hasty a few times and just jammed the lower on not making sure it was aligned, and got lucky. When you have the lower off, slide a wire up the tube to see if there are any obstructions, (coat hanger works). How is your thermostat? If you can determine the impeller is doing its job, then there is an obstruction in the the cooling path. I have heard of folks taking the thermostat out, then starting the motor to see if water is getting that far? Hope that helps

 

[goodtimesfishing]

Re: Help! 50 hp force over heating!

Make sure the passage is clear thru the water pump to the tube. Mine was filled with gunk and preventing water flow.

 

[jonesin]

Re: Help! 50 hp force over heating!

Really appreciate all of the reponses. So here's an update. New impeller, new thermostat and still over heating. Took the lower unit off and tried the coat hanger idea, didn't feel anything blocking the passage and made sure everything was properly aligned. Restart...still over heating!! Took the thermostat out and its bone dry. Why is the water not getting to the thermostat?

 

[tater76]

Re: Help! 50 hp force over heating!

Remove your exhaust side cover on the engine. You may find tons of deposits blocking the cooling passages. Mine definitely had a buildup. Hope that helps?

 

[Robert D]

Re: Help! 50 hp force over heating!

I took apart a Mercury a few years ago, similar issue. Pulled the exhaust cover and spent 3 hours cleaning salt deposits and corrosion. Apparently had been used in the bays. After that, it ran quite well, shooting a lot of water out the tell tale.

 

[jonesin]

Re: Help! 50 hp force over heating!

Removing the exhaust cover appears to be a big job. Is there an easier way to do this?

 

[jonesin]

Re: Help! 50 hp force over heating!

Ok here's the latest. Took the lower unit off and put the water hose to the copper water pump tube and water shot out of the thermostat just fine. Reattached the lower unit and exhaust cover got hot as hell and the buzzer sounds again. No one in my area works on force motors so that is not an option....HELP!!!
By the way... cannot get the exhaust cover all the way off. Do not have enough room to get off the lower bolts off. What do I do?

 

[goodtimesfishing]

Re: Help! 50 hp force over heating!

Are you using a barrel or muffs? sounds like maybe the pump is failing to prime maybe due to not being deep enough in the water. Put in barrel and make sure the water is above the pump. Also make sure the pin is in the impeller slot.

 

[jonesin]

Re: Help! 50 hp force over heating!

here's the latest...Decided to go ahead and replace the housing and all so went out today and bought the whole kit. Instructions with the kit says to turn the shaft counter-clockwise when installing the impeller but the boat store says clockwise. So a little confused. Don't want to destroy the new impeller but oh well I have a back up right? So I put the impeller on clockwise and nothing from the exhaust and it still gets hot. So I drop the lower unit AGAIN and install impeller counter clockwise and immediately get spray from the exhaust and it seems to be working. Gonna run longer tomorrow just to be sure but looks like it may be working. Would like to thank everyone for all the feedback and advice I really appreciate all of the help with this!

 

[jonesin]

Re: Help! 50 hp force over heating!

ok problem still not fixed! just about to give up!!!

 

[cajunfrank]

Re: Help! 50 hp force over heating!

im having the same issue with my force! Can someone explain how the impeller is supposed to go on??I tried pin on top and impeller on top and still no water. i also pulled the thermostat off and it was dry, let it cool then shot water into the thermostat hole and it poured out of the inlets so i kow the tubes are clear

Thanks

 

[jonesin]

Re: Help! 50 hp force over heating!

cajun- which way are u turning the shaft to install the impeller? I have been told both clock wise and counter clock wise. are you getting any water from the exhaust?

 

[cajunfrank]

Re: Help! 50 hp force over heating!

Well I figured it out, I need a new housing for the impeller( guess its the whole water pump) My impeller is strong but the housing is worn!!!Now the prob is finding one that wont cost me an arm and a leg

 

[jonesin]

Re: Help! 50 hp force over heating!

good luck!! mine was close to $200 and it still didnt fix it.

 

[cajunfrank]

Re: Help! 50 hp force over heating!

Got a new pump and it fixed that issue now I'm having problems with something else. I put the boat in the water and it ran fin the next day I went out to fish and it started right up nit as soon as I put it in gear it kills. Every thing I have read points to fuel issue. Any advice?

 

[jonesin]

Re: Help! 50 hp force over heating!

Well I have taken a little break from working on the boat and now I'm ready to get back at it. So here's what I have going on and I would really appreciate some advice! The motor is still overheating. Took it out on the water and had a mist from the tell tale thought I was good to go... took it up river a bit and only hot steam from the exhaust holes and BUZZZZZZ!!!! Brought it home and pulled the plugs, do not see any water so still hoping the head is ok. Pulled the lower unit off again and removed the thermostat. Everything looks just like it did the day i installed it. Took the water hose and forced water through the cooling tube and came out of the thermostat fine. So I am assuming that means there is no blockage in the cooling system. Could I be wrong? I have considered taking off the exhaust port plate and checking for clogs, debris, sand, etc. however I cannot get it off. The screws are too long and I see no way to take off the lower cowling. Does any one know how to do this? To me it just sounds like the pump is still not working. What do I do? Please help!!!

 

[jonesin]

Re: Help! 50 hp force over heating!

Ok just found out that I have to take off the entire powerhead to get exhaust plate off. I have removed all the bolts that I can see but it still won't budge. Does anyone know how many there are? Maybe I missed some.

 

[tater76]

Re: Help! 50 hp force over heating!

Well, sounds as if it is time to bite the bullet and think about lifting the powerhead just enough to get the screws out. Crud, wait a minute, if I remember right if you pull the powerhead you will need a new base gasket and run a bead of high temp silicone on a seperator ridge. Don't quote me on that though. Sorry, just checked my motor, and yes you will have to lift the powerhead off the base to remove the long bolts in the lower portion of the exhaust plate. It is actually not hard to do, and the gasket and silicone is cheap considering the cost of a rebuild from overheating. If you unbolt the powerhead and all connections to the base, you alone can lift it off, as it is not too heavy. The other route is to undo the lower cowling and slide it up over the powerhead. However, you may need to remove the carb, intake, plugs, fuel pump, some of the L fittings, dissconnect the steering linkage, starter solenoid, choke, etc to do this. It's kind of a preference job, but either way you will be buying a few gaskets. If it were me, I would lift the powerhead off. Hope that helps, and who knows, maybe Frank A. or someone else has a much simpler way to do this (lets pray they do