• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.

Announcement

Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

OMC Power Steering Problem

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts


  • OMC Power Steering Problem

    I have and old but very nice 1981 Ranger I/O with a GMC 3.8 and an OMC 800 out drive that I have owned owned for about 5 years. This unit has a power steering system that appears to consist of a pump, shuttle valve, cooler, and actuator piston. The system worked fine for the first several years of ownership. Then I noted an increased resistance to turning and detected a growling sound and my repair shop in Fort Worth replaced the pump which seamed to work. A couple of months latter I had the same shop replace the ball gears which turned into an overhaul of the out drive because of bad bearings. By the following winter it felt like the power steering had become completely nonfunctional. The boat sat for about 8 months then I took it back to the same shop where they tried swapping out the power steering pump, then the shuttle valve, then the actuator piston and cleaned the cooler. I picked up the boat and took it to the lake this weekend and there was no change in the power steering. It still feels like it is completely inoperative. The shop did say that I had a lot of drag in the steering cable and would replace for an additional $500.

    Any idea what the problem can be, I am about to give up on my repair shop.


  • #2
    Re: OMC Power Steering Problem

    Increased resistance and growling is usually a loose belt, but a failing pump would cause the belt to slip too.

    Funny there is no mention of anyone ever checking the p/s fluid lever. Is it losing oil?

    One common mode of failure for boat p/s system:
    -p/s cooler improperly winterized- freezes - cracks tube internal
    -p/s cooler leaks next summer- p/s fluid into the lake with the cooling water
    -pump runs low on fluid, p/s acts up
    -p/s pump fails
    -bad pump gets replaced and cycle repeats

    The cable is super easy to inspect visually. It can also be lubricated.
    The actuator valve, or power cylinder could be leaking internally.

    The actuator valve requires balancing, but imbalance would cause harder steering in one direction only so it's not that.
    The p/s gearbox, or the steering shaft through the intermediate could be binding due to lack of lube. There is a grease fitting inside the boat on the intermediate for that steering shaft.
    The outdrive itself could be the problem too, if the pivot grease fitting has not been lubed.
    The grease fitting is on the nose of the drive about level with the exh. port out the back of the intermediate- might have a red plastic plug over it. start there.
    If they left the shims out of the upper (under the top cover) that can also make for stiff steering.

    $500 a bit pricey for the cable - it's not the typical cable/drum stringer cable like they use for manual steering, it's a teleflex push pull type like Mercruiser etc. You could change it yourself if needed.

    Your symptom now is that it is stiff both directions and consistently stiff? Never even kicks the wheel or feels like it's trying a little bit?
    Is the belt on it?

    Comment



    • #3
      Re: OMC Power Steering Problem

      Thanks for the input! I have not seen any leaks or loss of p/s fluid. I will try to find and both of the grease fittings you mentioned and lubercate them. Can I just unscrew the steering cable from its attachment point on the drive to see if the steering cable is binding once seperated from the drive? How do I lubercate the steering cable? I will also check the tenshion of the p/s belt, I did notice some excessive vibration of the belt since it came back from the shop.

      Johndo2

      Comment



      • #4
        Sign up today
        Re: OMC Power Steering Problem

        ok...not all 800 drives have the grease fitting for the steering shaft..mine does not..not sure what years do and dont.....i had the same problem with mine, and as it turned out it was the steering box.....the output shaft was nearly froze in bottom bushing due to corrosion and lack of lubrication...i took whole assembly off, (mine was easy, as i had rubber boot off of transom for replacement)..anyways..i split the gearbox apart and had to beat the hell out of that output shaft to free it, i then took emery cloth to the shaft and bushing until it went together easily and rotated freely, then i greased everything and put back together...everything works great now....but, i think a bad seal on the steering shaft itself was the culprit..allowing water to seep along shaft and in and aroung that gearbox shaft.....easiest way to find your problem is to take off steering arm and try to move by hand, if it cant be moved, then remove outdrive and see if you can move it..with drive off it will be able to be moved by hand, if not its the gearbox or a seized steering shaft....

        Comment


        Working...
        X