I took the valve body off of the pump. Was covered in about 1/2 inch of
sludge. Didn't find any O'Rings in the valve body but I wasn't able too
take it completely apart. I did take it apart far enough to check the bb's
and springs and gear inside. everything looked ok except for the sludge
that I removed. I think maybe on of the springs was not in it correct place
though. After I cleaned up everything and put it back together I didn't
have enough trim fluid to refill the pump reservoir. I was only able to put
a little bit of fluid in. I attempted to tilt the motor and it did go up
farther than it has been going but only about 4 inches. Then pump was
catching air since the fluid was low. Maybe I got it fixed. ??? The only
other thing I am willing to change myself will be the o-ring in the trim
cylinder. I don't know if losing pressure in the trim cylinder will effect
the tilt cylinder and vice versa. I'll find out later today when I work on
it some more I guess.

JeffC

"JTC" wrote in message
...
I replaced O-Ring in the tilt cylinder with little improvement. Guess I
have to move on to the pump.


"JTC" wrote in message
...
Well, I bought an assortment of O-Rings to replace the one in the tilt
cylinder. If that doesn't work I'm going to take apart the pump to see
what
can be replace in it.

Thanks for responding.


"Rural Knight" wrote in message
ink.net...

"JTC" wrote in message
...
My 125 Force Tilt/Trim always slowly let the motor down when tilted
to
the
up position. Although annoying I lived with it for about a year.
Last
week
the problem got worse. Now the motor will not tilt up unless I
assist
it
by
lifting the lower unit while using the trim button to tilt the motor
up.
I
have examined the o-ring in the tilt cylinder and it looks fine. I
bought
a
replacement O-Ring anyway but it is the wrong size so I have to get
another
one. However, I cant help but suspect the valve body on the pump.
Does
anyone know what symptoms would indicate a problem with the valve
body
verses the O-Rings in the tilt cylinder? And for those who have
replaced
the O-Rings before, do they usually look damaged and mangled or
what?

Any advise is greatly appreciated.

The loss of pressure could be caused by any number of things,
but the piston/cylinder seal is probably the most likely cause of the
problem. Other causes could be fluid reserve, value body,
pump impeller, etc.

There isn't any real way to tell if an O ring is bad, but a reasonable
test is how hard it was to get the piston out of the cylinder. If it
produced a reasonable vacuum when it came out, then it most
likely was good. The cylinder seal would show signs of leaking.

Other than that, it is an internal leak in the pump (more O rings),
fluid level or a combination of same.

I would suspect internal leak though because you didn't say
anything about oil leaks.

Later,

Tom