1975 Mercruiser Tilt/trim issue

[kenny nunez]

Look up a post from May 11 this year. The poster replaced his old style Prestolite pump with a newer style “Oildyne” style. I explained how to adapt the style with pipe fittings from the local hardware or auto store.
The only parts available for your pump are some of the electrical and none of the hydraulic unless you take a shot on used stuff.
As Bondo explained replacing the hoses is easy as he described. However if your hoses are good leave them alone.

 

[rogerrabbitis]

Nope, there should be 2, 7/16th nuts at the bottom of the transom that hold the manifold in-place, removing 'em allows pulling the manifold down, to unscrew the inside lines,....

oh ok I did not know that I will have to take a look thanks for letting me know this

 

[rogerrabbitis]

Look up a post from May 11 this year. The poster replaced his old style Prestolite pump with a newer style “Oildyne” style. I explained how to adapt the style with pipe fittings from the local hardware or auto store.
The only parts available for your pump are some of the electrical and none of the hydraulic unless you take a shot on used stuff.
As Bondo explained replacing the hoses is easy as he described. However if your hoses are good leave them alone.

ok thanks I will look up that post and from my test I don't belelve I have a collapes line when we crack the line at the pump the pressure gets realsed and drive goes down witch I belelve it tells me it's with the valve in the pump sticking when high pressure

 

[rogerrabbitis]

I am going to try to use it this weekend and see how it goes... oping it may clear it's self at this point till I find a new pump

 

[rogerrabbitis]

HI all so I used the boat over the weekend did not really rase it all the way to the top and it worked ok I noticed though when putting in reverse the lower end went up on it's own all the way is that a ram issue or ? also my trim indicator is always showing up also I have one of these any idea what it does ?

 

[Bondo]

also I have one of these any idea what it does ?

Ayuh,..... That, is the reverse-lock, 'n the trim indicator,.....

 

[rogerrabbitis]

Ayuh,..... That, is the reverse-lock, 'n the trim indicator,.....

it does both ?

 

[Scott06]

it does both ?

yes. Get a factory manual for your set up you will find it invaluable

if drive came up in reverse I would think you have a bad reverse lock out. After the R drive (and later MR/Alphas) replaced the set up you have in 1982 or so this was all done differently not sure if lock out was done in the pump, Kenny or Bondo likely know

 

[redneck joe]

^^^note^^^

he said factory.

 

[Bondo]

yes. Get a factory manual for your set up you will find it invaluable

if drive came up in reverse I would think you have a bad reverse lock out. After the R drive (and later MR/Alphas) replaced the set up you have in 1982 or so this was all done differently not sure if lock out was done in the pump, Kenny or Bondo likely know

Ayuh,...... Reverse lock is done in the pump on later systems,.....
Drive position is done in the pucks, after they were added to later drives,....