125-Overheating engine??????

[stack08]

i got a force 125

well i went out last weekend and everything was good today i put it in the water start it up and as i pull way from the dock the buzzer goes off.No water comes out of the two little holes at idle.

Is the impeller and or the water pump bad?

How do i tell which one it is?

I'm handy ....thinking of getting the manual and where can i get these parts online and which ones?

Best prices and complete rebuild kit i think is the way to go but let me know my options...

force 125 outboard
#s on motor (front of motor up top) 1258F9E white peice of paper and also another sticker say this.

these other #'s were also on the motor other spots
422 91
m630 86

thanks for looking....

 

[wajajaja02]

Re: 125-Overheating engine??????

Good luck, I have one of those, two years later and three marinas later. two rebuilds on the water pump, took two summers to get the parts, seem take all summer for merc to come up with the pump housing. Now I replaced the head gasket myself, that took all winter, three frozen bolts, but now the boat runs great, but I bought a new one and was sick a lot, so it sat this summer, so I haven't really tested it. Great boat. if its good now, it
will be my lake boat.
Parts are easy to get with a good merc dealer, or on line here at I boats. The mechanic that actually fixed it was my neighbor school vo tech whiz kid. He spotted the head gasket problem.

 

[stack08]

Re: 125-Overheating engine??????

wow thats crazy it took that long i'm trying to get this done a.s.a.p so i can still take it out ..Hope i can get more input on this and get these parts that i need.....

 

[Stavie]

Re: 125-Overheating engine??????

Q: Is the impeller and or the water pump bad?

A: They are one and the same here ,if your are over heating check your thermo first ( its easier) then you may need to drop the L/U and visually inspect it.


Here is a site with schems and parts number etc. use it for reference.

http://www.ishopmarine.com/ishop/js...&isForSupStore=false&cCatFilter=&eCatSupFldr=


To continue ...... I paid about $50 for mine housing and impeller kit ( two for that matter and 3 impellers ) Start there and if you have any questions just shoot a reply .

 

[stack08]

Re: 125-Overheating engine??????

thanks for the info.

How do I check to see if the stat is bad.would it even be the stat because there is no water coming out at idle.doesn't the stat just tell if it's hot and sound the buzzer.smoke thick started to come out of the holes.

I was looking at that site but having a hard time pin pointing the exact pump rebuild kit.also thinking about ordering the manual so I can follow of as I change it good idea or common sense on how to change it?

Thanks for the help-:

 

[stack08]

Re: 125-Overheating engine??????

Q: Is the impeller and or the water pump bad?

A: They are one and the same here ,if your are over heating check your thermo first ( its easier) then you may need to drop the L/U and visually inspect it.


Here is a site with schems and parts number etc. use it for reference.

http://www.ishopmarine.com/ishop/js...&isForSupStore=false&cCatFilter=&eCatSupFldr=


To continue ...... I paid about $50 for mine housing and impeller kit ( two for that matter and 3 impellers ) Start there and if you have any questions just shoot a reply .

still having some trouble...

 

[Stavie]

Re: 125-Overheating engine??????

You can check you stat buy dropping it in boiling water about 120 + degrees it should open . As for the kit it is number 11 on that site you should see if a local dealer part supplier has it so that you can be sure you are getting everything. One of the marinas near me had the kit and an impeller it is a more common part request.

Let me know if I can help with anything else .

 

[stack08]

Re: 125-Overheating engine??????

ok i'll see what i can do...

thanks for the info.

 

[gregmsr]

Re: 125-Overheating engine??????

Read the sticky thread up top "Step-by-Step Impeller Change", good stuff.

Remove the lower unit and check the pump housing for scaring/pitting. If the inside looks ok and smooth, you probably can get by with only the impeller change. The impeller is a standard part that any marina will have in stock.

On top of the thermostat housing, there is a small plug. You can remove this plug, attach a fitting and piece of hose. Start motor and see if you have water flow.

The thermostat does not sound/activate the buzzer. There is a temp sending unit mounted in the head for that.

Read the "sticky".

 

[stack08]

Re: 125-Overheating engine??????

thanks i'll look at that thread and also try the other idea...

Thanks...

 

[briguy2817]

Re: 125-Overheating engine??????

Just a quick question. At full throttle, how much water is supposed to come out of the pee holes? When I'm at full throttle, it just sputters out, at idle it comes out pretty good. I added a telltale and it continues to come out of there with no problems at full throttle.

On Sunday I took the boat out to a local nuclear power plant cooling lake and the buzzer started going off. I idled in to the dock to check it out and it never came back on again. My thinking is the HOT water from the lake isn't cooling the motor like it should. I just got back from the same lake an hour ago and no problems today, just not a whole lot of flow through the pee holes in the back of the motor at full throttle.

Any comments appreciated.

Brian

 

[gregmsr]

Re: 125-Overheating engine??????

If you have a good flow from the tell tale, the impeller should be pumping fine.

Did you check/replace the thermostat?

My 125 sputters and spits from the pee holes, sometimes a solid flow. I check the holes for flow after starting up, then off I go.

There is a test for the temp sending unit also. Have to find it but something about removing it from the head, with the ignition switch on, placing it in a pan of hot water increasing the temperature until the buzzer sounds. Then check the temperature of the water. (Not likely the problem)

Check the stat, flush the motor (check for blockages)

Install a water temp guage. Is it actually getting hot? Try a hand held heat gun (infrared) aimed at the block while buzzer is buzzing.

 

[Racer]

Re: 125-Overheating engine??????

Well I had similar problem and it was the impeller.

I normally wouldn't have any trouble unless we would decide to do some waterskiing. Just chugging around basically at idle to pick up a skiier or whatever would always cause the heat buzzer to go off. If it put it into fast idle it would shut off after 30 seconds or so. Once I replaced the impeller, which really didnt look as bad as I thought it would, i can idle around all day now without overheating. But once I replaced the impeller, I definately had more flow coming from the pee holes in the back.

 

[stack08]

Re: 125-Overheating engine??????

well i took my lower unit off today and found the impeller was shot and all the peices were stuck right there...also found the gear housing cover was pitted up so i will also be changing that.....

Now when i put everything back whats the major stuff i have to look out for?

thanks for all the help....

 

[jim_b_20653]

Re: 125-Overheating engine??????

You should consider adding a Tell-Tale to your cooling system. There is thread in this forum that explains how to. I added one to my Force for less than $10, and it's nice peice of mind to glance back and be sure the water pump is working.

 

[gregmsr]

Re: 125-Overheating engine??????

Careful not to over torque water pump housing, even torque as not to warp the housing (inch-pounds should be stamped on housing).

"Set" the impeller in the housing in the correct direction. (can't remember off top of my head)

Use anti-sieze on lower unit bolts

Be sure the seal is on the top of the shaft before inserting up into the crankshaft (I found mine lodged down in the lower casting where the previous installer let it fall off)

Have someone help you reinstall the lower unit (will have to turn flywheel slightly to get the splines aligned. This was my most difficult part.)

Be sure the water tube is aligned properly and back in place

Read the sticky "Step-By-Step Impeller Change"

A fairly simple job, just pay attention to what your doing.

 

[briguy2817]

Re: 125-Overheating engine??????

Well I had similar problem and it was the impeller.

That was my experience with some other boats that I've had. THe thing looked pretty good but had no pumping capabilities. I have an impeller ordered and should get to it by this weekend.

 

[briguy2817]

Re: 125-Overheating engine??????

I added the telltale the day before and it sprays all the time, even during full throttle. All that is telling me is the water is getting up to the thermostat, not actually going through the thermostat/ head.

Your right on the cost, I think it was about 3.78 total. Including the gas to the store.

Brian

 

[briguy2817]

Re: 125-Overheating engine??????

Install a water temp guage. Is it actually getting hot? Try a hand held heat gun (infrared) aimed at the block while buzzer is buzzing.

My thinking was the water flowing is one thing, to actually see what the temperature of the block is is another. I'm going to look into getting something together for the sending unit. Who knows, maybe it will be another cool mod to do to our boats.

As far as the infrared thermometer, I forgot to bring it the other day. I guess it's a good excuse to put the boat back into the water tomorrow.

Brian

 

[stack08]

Re: 125-Overheating engine??????

nice thanks for the advice.
I will also look into instaling a telltale like this when it starts to go again water will not come out and at least I can see it.

Now will putting the telltale in harm or do anything to engine as far as power loss or anything?