Guests - If You want access to member only forums on HSO. You will gain access only when you sign-in or Sign-Up on HotSpotOutdoors.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
Guest

Tilt&trim 1981 merc

10 posts in this topic

I have just replaced my tilt amd trim motor and valve assembly. I have all the lines on correct and have filled the pump and run the pump "it works" motor goes up and down "but" when it is in the up position it will drop to full down in about an hour. I would like to know if their is a trick to fill and bleed the pump and lines everything seals tight and I have no leaks. I used 20w oil like it says to with out detergent. The motor is a 1981 merc 115 the pump has 4 lines under it with 2 cylinders to raise the motor. Pump is used and worked when it was taken off other motor.

Share this post


Link to post
Share on other sites

Redfisher, check your pump, it should have a knob (small cylinder with grooves on it) on top, turn it all the way one way or the other, it's used to lower your motor if it gets stuck in Up position. If it doesn't work, bad news, you might need a rebuild kit for your cylinders, it's not tough if you have some mechanical experience.

Val

Share this post


Link to post
Share on other sites

The screw is a the way left which is in the closed position and none of the lines seem to be leaking cylinders look ok too. I might have to just replace the seals and see it that dose the trick. It will hold the motor up just above full down. I think it is messing with me now.

Share this post


Link to post
Share on other sites

It might be seals inside cylinders, you can also try to push motor down when it's up, if it lowers, you have confirmation.

Funny, my pump says 10w30 motor oil on it. I asked to other people and they all have different tags, some 30w, some Auto Trans fluid....

Share this post


Link to post
Share on other sites

Well I can put all my weight on it and it wont go bown but I think I will change the seals in the cylinders anyway.

Share this post


Link to post
Share on other sites

I changed the trim/tilt in a newer Merc. and to bleed the lines all I had to do is lower and raise it about 20-30 times removing the fill cap after each cycle. This is what my manual said to do to bleed the air out. It said that if it lowers by itself you probably have air in the lines. Something to try before tearing it apart. Good Luck.

Share this post


Link to post
Share on other sites

Well I rebuilt the cylinders and blead it how the directions said and it still falls I think the boat has it in for me. I give up. It is for sale and their is a pic on http://www.bookooboats.com/index.htm anyone with a good offer can have it every thing else works fine, it is a great boat but the tilt and trim hates me.

Share this post


Link to post
Share on other sites

Redfisher, which boat is it ?

Share this post


Link to post
Share on other sites

sorry It is the 1981 ranger with a 115 merc it is brown, there is a ugly blue garage in the pic.

Share this post


Link to post
Share on other sites

the boat is under bass than under 0-10,000 about 1/2-2/3 way down page. My E-mail has changed and they have not up dated it yet. It should be done soon.

[This message has been edited by redfisher (edited 08-19-2002).]

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • East wind is the worst...!! Bad juju. Always means a storm. Gonna have an East one tomorrow......and my barometer is already headin' down, in time for the 6-8" of big snow tomorrow. Watch it plummet before a bif summer storm, or rise into the 30's on those warming, clear days. I've always watched the winds and barometer since I was a kid (got into the weather thing in "science class") , you can do better yourself than the forecasters do. It's easy and fun, IMO.
    • I guess I never associated a north wind wind lower pressure. Or a south wind with higher pressure.  Learn something new everyday
    • I watch when it drops below 29.5 Hg on down (29.0 Hg or mb; millibars) or when it swings up past 30.0 mb. That's my reference for "highs" or "lows" on my Barometer. Remember to adjust yours to your local Wx reading, they have a slot shaft in the back of the meter for that. I  love my old dial Aneroid barometer.  They last forever, too.  Mines kicking about 35 years... (That's not mine, pic is for low and high reference...)    
    • Thanks Rebel, very good answer.  I've been keeping track of the pressure for a week, now. 
    • Hey Rebel, what do you consider low and high pressure?  Perhaps a stupid question, but I just got a weather station so now I can start tracking barometric pressure. Right now the numbers don't mean much to me, been around 28-29% in the south metro the past few day and I don't know if that's low, high or middle.
    • Low pressure signals a front moving in, (Bad weather, wind may be  from the east or north) which usually puts them "on the feed", can have some hot and fast action. Likewise, a swing in the other direction, a high pressure system , (wind from the west or south) which signals clear skies and sunny weather, may do the same. The key to me, anyway, seems to be hitting it just as either front moves in. An extended low or long high may result in poor fishing. Remember the old adage, which also has to so with the pressure: "Wind from the east; fish bite the least...wind from the north , the fisherman goes not forth, wind from the south, blows the bait in the fish's mouth; wind from the west, is when the fishing is best". 
    • Those trumpers sure know how to keep things classy.
    • Is it true, the lower the pressure, the bite gets hot? Or the higher the barometric pressure the fish slow down on biting? 
    • Is that like saying "the lights are on, but nobodies  home.?
  • Our Sponsors