What are the sings of a seize up

Quinnfloor

Cadet
Joined
Jun 12, 2006
Messages
11
My 115 Johnson will still run but I'm scared it is on the verge of seizing up. What are the signs?
 

xtraham

Lieutenant
Joined
Jul 20, 2006
Messages
1,425
Re: What are the sings of a seize up

pull all the spark pulgs see if you can rotate the flywheel in a clockwise direction if it moves easy check the compression
 

jtexas

Fleet Admiral
Joined
Oct 13, 2003
Messages
8,646
Re: What are the sings of a seize up

And tell us what the spark plugs look like; and if any are different from the rest, which hole they came out of. Look at the color of the ceramic and insulator, electrodes, any carbon build-up, silver-colored flecks, broken parts, has the gap got wider or closer, etc.

Checking the cylinder head temps might also relieve some of your anxiety...use an IR temp gun, or thermomelt sticks - 125º should melt when the thermostats open; 163º should not melt at all. Take it out & run full throttle for a few minutes then test the temp.

Test your overtemp warning horn...it should sound when the tan wire is grounded. Cylinder head covers have to be pulled if you want to test the sensors...but probably not worth it if the above tests show normal op temp.

If the compression, operating temps and spark plugs are all good, you can relax.

Maybe replace the water pump impeller just to be safe. and do a decarb.
 
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