Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

  • Announcements

    • Rick

      1st Please Post Your Fishing Report - Then Join the NEW - Private Fishing Report Clubs   01/24/2018

      Private Fishing Report Clubs - Click Here - Post Your Fishing Report Before Joining
      1st, be sure you post a fishing report in the forums, then ask to join after you post a fishing report in your area forum. The Private Fishing Report Clubs are where folks can share private fishing information with club members who have proven they know what's going on. Fishing Report Clubs Link also in Menu above. Apply to become a member today, while it's still easy. 
  • RECEIVE THE GIFTS MEMBERS SHARE WITH YOU HERE...THEN...CREATE SOMETHING TO ENCHANT OTHERS THAT YOU WANT TO SHARE

    You know what we all love...

    When you enchant people, you fill them with delight and yourself in return. Have Fun!!!

  • 0
Sign in to follow this  
Daze Off

Water in the Lower Unit

Question

Daze Off

Just winterized the boat motor 75hp Merc and found that water had infiltrated the lower unit at some point - any idea what kind of repairs are required and how much they might set me back? Never had this happen to me before....

Daze Off

Share this post


Link to post
Share on other sites

11 answers to this question

Recommended Posts

  • 0
mtreno

ouch - there is only one cheap long shot way i know of out of this one. bad seal on the plug - other than that your talking about a new lower unit.

Share this post


Link to post
Share on other sites
  • 0
marine_man

Quote:

other than that your talking about a new lower unit.


Not neccesarily... it could be as simple as the prop shaft seal got some fishing line wrapped around it, cutting the seal. It'll require replacing, but way cheaper than replacing the entire lower unit.

I'd say replace the lower unit oil to cover you until spring for sure... if you're in the mood and a little handy take the lower unit off and into the dealer and have them take a look at it. They'll pressurize the lower unit and figure out which seal(s) are leaking.

Double check your plugs, both top and bottom to make sure they've got a gasket on them (and only one).. other than that I'd say it's time for a trip into the dealer.

It can wait till spring since you've replaced the lube, but if you take it in now you won't have to deal with it in spring.

marine_man

Share this post


Link to post
Share on other sites
  • 0
eurolarva

If you are not up to the task yourself call around to marinas. I had Twin City outboard do mine for 200 bucks about 5 years ago but it had to be done over the winter. Marinas are real slow during the winter so you might get a better deal. Seal kit for that motor is about 30 bucks and a service manual is about 40 dollars. Good Luck

Share this post


Link to post
Share on other sites
  • 0
ChuckN

Ditto what eurolarva said. wink.gif

Share this post


Link to post
Share on other sites
  • 0
Daze Off

Thanks guys - I am not handy with engines at all - it was a big undertaking to winterize it myself this year (with help from neighbor) - always had it done by shop in past so will be taking it to a shop - called the dealer where I bought it who indicated it could be as simple as the prop seal ($150 P&L). So will try that route first and hope for the best.

Weird part is that I thought I saw water emerging from around the sacrificial anti-corrosive plate while we were running the motor with the rabbit ears to fog the top. Did not look too closely as I had no real reason to at that point. I remember thinking it must've been side spray from the ears.

Daze Off

Share this post


Link to post
Share on other sites
  • 0
blgoose

I had the same problem this year with my 40 hp merc.Its wasnt just a little water more like a cup. No fishing line around the shaft either.I noticed the drain plug and fill plug had no rubber washer.I am hoping this is the problem.Is there supose to be a rubber washer? I know there's one on my 50 hp yamaha.

Share this post


Link to post
Share on other sites
  • 0
Dave

Make sure the rubber washer isn't just stuck to the lower unit after pulling out the plugs, too.

Share this post


Link to post
Share on other sites
  • 0
Valv

Quote:

Is there suppose to be a rubber washer? I know there's one on my 50 hp yamaha.


Yes, you ahve to have a washer to seal, as mentioned check if it's stuck in the therad of the hole, if not you've probably found your problem, and remember there are 2 plugs with washer, the drain/fill (bottom) and the overfill (top).

Share this post


Link to post
Share on other sites
  • 0
Rivernut

Daze, I had the same with my 25 Mer. All it was, was a prop shaft. Get the kit and the repair manual and you're in business. Manual is a good thing to have around. You'll be able to handle it just fine. I should add that it's not a bad idea to pay a dealer to pressure test it first.

Share this post


Link to post
Share on other sites
  • 0
rookie44

if you run your motor with a broken or off balance prop,the seal can go out from shaft vibration also.

Share this post


Link to post
Share on other sites
  • 0
Daze Off

Excellent suggestion! Thanks!

Daze Off

Share this post


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



  • Your Responses - Share & Have Fun :)

    • osok
      Been a brutal hard water season for me as well, figured it was a continuation of my fall fishing luck. 
    • Wanderer
      Thanks guys.  I checked out Modis for ice coverage and Navionics to help understand how things are laid out.  Knowing what areas certain fish prefer and those typical depths is a big plus.
    • urbaniceteam
      My wife and I are hoping to get up to Mille Lacs this Saturday and spend the night on the ice.  Does anyone have any last minute availability?  All the resorts I've contacted are booked. Thanks!
    • Borch
      Lots of nice fish!  Central Mn is cranking out some nice panfish.
    • eyeguy 54
      I did till about 2 then just had to go for a bit. LOL 
    • IceHawk
      Nice fish guys. Royce doesn't look like you took the day off 
    • IceHawk
      Great Idea Rick 
    • Borch
      A plus is that the forecast is for a much nicer day Saturday.
    • Tom Sawyer
      Thanks for your work guys! You were showin' some serious team spirit being out there today. I would have helped but I had a few appointments today I couldn't reschedule. I know I'm available Friday to do any last day scouting/fine tuning....
    • IceHawk
      Definitely a grind out prefishing cats today for the gathering.  Weather made it to tough but I Jeff  and his brother pushed through the elements to try and find a few active schools .   Locating the schools were tough took a pile of holes and the augers got a workout for sure,  but fortunately  we did find a couple active schools. Jeff and his brother found a few on one lake and I found a decent school on another lake. The good news was that both schools were cruising shallow flats in both locations and about the same depths. Great news as this is a good indication they are feeding on these flats.   Amazeingly both schools were found on a inside corner. Bingo looks like we have a pattern formed. We iced and marked  a fair number of cats in both locations so things are looking good for Saturday. Plus is we added a few for the fish fry already  Jeff I'll keep plugging away out there hopefully I can dial them in even more I have a hunch there are a few more close by where we ended. 
  • Share & Have Fun