125Hp Seized?

[Larman]

I took my 1986 Force 125HP out today. I ran 16 miles to CT from NY had a great lunch and headed back 8 miles into the trip the engine just stopped. In fact when it stop it kicked up. I tried to restart but it will not even turn and the started started getting hot from trying to tuen the engine. The high temo buzzer was going off but the actual engine temp was 150 degrees? Any ideas? How can I tell if this thing is seized? I removed the spark plugs but still cant get to turn?

 

[john from md]

Re: 125Hp Seized?

Did you forget to put oil in with your gas?

It sounds like your engine is siezed up. Your temp gage may be faulty but if your buzzer is going off, then your temp is over 180*.

Try pulling the plugs and spraying penetrating oil into the clyinders. Let it stay overnight and then try to turn it.

John

 

[jerryjerry05]

Re: 125Hp Seized?

Drain the oil in the lower.Check for metal shavings/chunks of metal.
If that checks OK. Remove the plugs spray in some lube,and see if it turns over.If it turns over then do a compression test.If that tests OK.
Then drop the lower and then try to turn it over.J

 

[Larman]

Re: 125Hp Seized?

Pulled the plugs sprayed with kroil let sit for 2 days and it will not budge. Should I drop the lower unit?

 

[jerryjerry05]

Re: 125Hp Seized?

Yes. Drain the oil first to check for big chunks.Make sure you use the drain plug and not the pivot screw.J

 

[mikel1291979]

Re: 125Hp Seized?

If all else fails pull plugs, spray in lube and leave them out. The get a big *** breaker bar and socket. Put them on your flywheel nut. Break it loose by hand then spray more lube and let sit. Turn motor by hand with plugs out listen for horrible metal on metal sounds then compression check.

 

[roscoe]

Re: 125Hp Seized?

I'm guessing you hit something in the water, jamming the lower unit.
Doesn't happen often, but does happen.

Can you get it into neutral?
Does the prop turn freely?

I would drop the lower unit and see if it changes anything.

What do you have to lose?

 

[john from md]

Re: 125Hp Seized?

If you didn't get any movement, I say it is the powerhead that is locked up and not the lower. I suggest you pull the intake off and head and take a look in the cylinders for scoring and ring damage.

John

 

[Larman]

Re: 125Hp Seized?

I tried the breaker bar on the fly wheel will not budge. I will trying taking out lower unit oil and check for metal/water etc. I see a screw on the bottom of the lower unit and then two screws close together do I unscrew the lower screw? Also where are the bolts to drop the lower unit?

Thanks

Larry

 

[jerryjerry05]

Re: 125Hp Seized?

There is an allen head set screw on the very bottom.The slotted screw on the side is a pivot pin DO NOT REMOVE!!!!
There are 6 bolts around the lower and 1 allen head bolt under the exhaust snout.Remove the shift linkage first.
You remove the plugs?J

 

[Larman]

Re: 125Hp Seized?

Yes I have removed the plugs. Thanks for the heads up on the screws.

Larry

 

[further]

Re: 125Hp Seized?

Also check out Franks post on replacing an impeller sticky at the top of the forum. He gives detailed instructions on how to remove the lower unit.

 

[Larman]

Re: 125Hp Seized?

Dum de dum dum....I removed the drain screw from the bottom of the lower unit and 2 drips of oil came out. It should be pooring out correct? Should I pull the lower unit and see if I can get the flywheel to turn?

 

[further]

Re: 125Hp Seized?

Yes

 

[Frank Acampora]

Re: 125Hp Seized?

Most likely, you seized the powerhead due to overheating. However, It is also possible that you have snapped the prop shaft at the drive dog clutch. If this were the case, though, the engine would turn over in neutral and yours does not. It is also possible that it may have thrown a rod. Sorry to be the bearer of bad news.

Oil will not come out of the lower unit except in drips unless you also unscrew the vent, fill, or both plugs. Bite the bullet and remove the head to see the extent of the damage.

The engine most likely kicked up because of the violence of the locking up at speed, and the resistance of the prop in the water-- remember: The prop stops dead, and it is like dragging a 13 inch plate through the water at 30 MPH (or whatever speed you were going)

 

[Larman]

Re: 125Hp Seized?

I pulled the lower unit. Tried to crank and it did not budge. Took out the water pump and it was in very good condition. I agree it may be a rod or something more serious. Anyway this is out of the rhelm of my ability to repair can any give me a ball park as to what this would cost to repair? Should I just throw it away?

Thanks for all the replies and help!

Larry

 

[Frank Acampora]

Re: 125Hp Seized?

Well, It really depends upon the amount of damage and how much work you can do yourself. The pistons cost about 75 -125 new, depending upon brand and reboring can cost up to 65 bucks a cylinder.

A rebuilt short block will cost upwards of 1500 bucks and then there is installation costs. If you take it to a dealer or marina, then you will be paying too much and yes, it would be better to throw away the engine and repower.

HOWEVER: If you can find a guy like me locally who repairs and rebuilds engines for a hobby, then the cost would be more in line and it may be worth keeping the engine.

See my private message to you

 

[Larman]

Re: 125Hp Seized?

How can I check my pistons. Is there an inspection plate I can pull off? I see a plate on the back of the engine near the spark plugs with many bolts on it, is that it?

 

[john from md]

Re: 125Hp Seized?

You can pull the head off, you can pull the port covers off on the fuel pump side and you can pull the reed plate. I recommend not pulling off the exhaust chest cover (plate with many bolts) as they break rather easily.

If you pull the head, you can see if there are any holes in the piston crowns and check the cylinder walls for scores.

If you pull the port covers, you can see one side of the pistons and the rings.

If you pull the reed plates, you can see the connecting rods and under sides of the pistons and some of the lower cylinder walls.

If it were me, I would probably pull the port covers off to see how much metal/damage I could see. If you see too much destruction, you may just want to part it out and re engine.

John

 

[jerryjerry05]

Re: 125Hp Seized?

Fill out the profile maybe someone is close and can help.J