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.

  • Announcements

    • Rick

      Members Only Fluid Forum View   08/08/2017

      Fluid forum view allows members only to get right to the meat of this community; the topics. You can toggle between your preferred forum view just below to the left on the main forum entrance. You will see three icons. Try them out and see what you prefer.   Fluid view allows you, if you are a signed up member, to see the newest topic posts in either all forums (select none or all) or in just your favorite forums (select the ones you want to see when you come to Fishing Minnesota). It keeps and in real time with respect to Topic posts and lets YOU SELECT YOUR FAVORITE FORUMS. It can make things fun and easy. This is especially true for less experienced visitors raised on social media. If you, as a members want more specific topics, you can even select a single forum to view. Let us take a look at fluid view in action. We will then break it down and explain how it works in more detail.   The video shows the topic list and the forum filter box. As you can see, it is easy to change the topic list by changing the selected forums. This view replaces the traditional list of categories and forums.   Of course, members only can change the view to better suit your way of browsing.   You will notice a “grid” option. We have moved the grid forum theme setting into the main forum settings. This makes it an option for members only to choose. This screenshot also shows the removal of the forum breadcrumb in fluid view mode. Fluid view remembers your last forum selection so you don’t lose your place when you go back to the listing. The benefit of this feature is easy to see. It removes a potential barrier of entry for members only. It puts the spotlight on topics themselves, and not the hierarchical forum structure. You as a member will enjoy viewing many forums at once and switching between them without leaving the page. We hope that fluid view, the new functionality is an asset that you enjoy .
Sign in to follow this  
Mid-Lake Rock

Lube for the Lower Unit

Recommended Posts

I'm going to winterize a Yamaha four stroke in the next few days. Not sure what is in the lower unit for lube. Had it done by a marina free of charge last year. Anyone see a problem with using synthetic if a conventional product in in there now?

Thanks in advance.

Share this post


Link to post
Share on other sites

Amsoil lower unit lube is good stuff. What ever you use, make sure it's specifically for lower units and not just 75-90 gear lube.

Regular automotive gear lube is not formulated to handle the high speeds the drive shaft is spinning, and will foam. Foam in your lower unit is very very bad. Lower unit gear lube is forumlated to take the high speeds of the crank drive.

Share this post


Link to post
Share on other sites

No reason you can't use a synthetic if there's a conventional in there right now. I also agree with Boilerguy... it needs to be forumlated for marine use, not regular gear lube.

marine_man

Share this post


Link to post
Share on other sites

Best bet would be to pick up a quart of Yamaha gear lube at the local marine dealer.

You'll also need the special adapter for the pump to screw into the Yamaha fill hole, as the pump you need to buy will probably have a different size adapter for other engines. This should also be available at the marine dealer.

Share this post


Link to post
Share on other sites

A magazine that writes about bass and walleye boats has an artice in their latest issue about lower unit lube. They did a number of tests and some of their finding were pretty interesting. Basically each lube has a specific application. The average fisherman is better off staying with standard lubes. If you run hard and at full throttle the high performance lubes are better. In the end they recommend using what the manufacturers suggest. Overall Evinrude HPF-XR lube tested the best, but not necessarily the highest in each test.

Share this post


Link to post
Share on other sites

Here is an update with some questions. I finally finished fishing open water and put the boat away for the winter. When I changed the gear lube this past weekend, I found a few surprises and wanted some thoughts.

Background: Two winters ago, I had the lower unit pressure tested and there was a leak. Yamaha paid for the seals to be replaced at a Yamaha dealer. They replaced the lube after the fix. Last winter I drained the lube and had a small amount of clear water exit. Lube was not cloudy. Took boat back to dealer that did seals, they did another pressure test and said everything was good. They filled lower unit.

This past weekend, I went to drain and didn't have flow. Looked at the bottom fill hole with a halogen and could see frozen water. No lube, but clear liquid. I put a heat source at the hole, and melted in a few minutes. A very small amount of clear water drained (I'd quess less than 1/4 oz. Following the water was a steady stream of oil. The lube did not look cloudy, however the lube that was in there was golden in color. Looked similar to fresh engine oil.

Here are my questions:

1. What type of lube is this? Every lube I've seen for lower units is dark (green/blue in color), including the lube from the dealer after changing the seals two years ago.

2. Any thoughts on the small amount of water at the bottom? As I said, the lube did not appear to be cloudy and was almost translucent. The seals are only two seasons old.

I put heat on the lower unit and completely drained before filling with the proper lube. My thought is to run the boat a few times in the spring and check for water.

Any input is greatly appreciated.

Share this post


Link to post
Share on other sites

If you are getting a small amount of water but the lower unit pressure/ vacuum test ok it is probably coming from the gasket around the drain plug. It isn't a bad idea to replace these every year.

Share this post


Link to post
Share on other sites

Not sure what kind of lube it is, but I don't think I'd be too concerned about it.

Replacing the gasket around the drain plug and top vent plug is a good idea, especially if this has happened twice now... and checking it in spring after running it a couple of times isn't a bad idea at all.

marine_man

Share this post


Link to post
Share on other sites

You said they did a pressure test. Did they do a vacuum test? A pressure test will not always show a water leak. A vacuum test will not always show an oil leak. You could have an outer shaft seal (drive or prop) that is shot and allowing water to get in and a perssure test will never show that. As Rob and wakeguy also said, it is very possible to have the drain or vent screw leaking as well.

What kind of oil is golden? Regular lower unit lube (dead dinosaurs). The synthetics or synthetic blends are usually the ones that have a green or blue color to them.

Why was the water clear and so was the lube? Oil and water do not mix. Over time they will separate and the water will go to the lowest possible point ans settle there.

I hope this was helpful

Share this post


Link to post
Share on other sites

Amsoil Marine gear lube is golden colored. I've used it for years with good results in our sport boat and now in my Yammi 115.

Share this post


Link to post
Share on other sites

Thanks for all the input. I'm going to start with new gaskets at the drain plug and top, run it in the spring and check for water. If something there, I'm taking it in for the pressure and vacuum tests.

Share this post


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



  • Posts

    • Feel free to explain how you keep food out of the danger zone while using sous vide when you are cooking at temperatures in the danger zone for many hours.   
    • I have a feeling PIYA is an acronym. Maybe it stands for Pain In Your A@@.
    • Yes and it sucks. Putting a pro view in Lp mode in shallow water means you are going to have a narrower cone. (Because LP mode is low power which is a 50% cut in power which less power equals narrower cone on a pro view)  To get a wide cone angle and sharp returns in shallow water is impossible with a pro view. To get a narrow cone in deep water if you need the gain up it is impoosible with a pro view. basicly the pro view cant do what a person wants. Which is a wide beam low gain/lp mode in shallow water and a narrow cone higher gain in deep water. 
    • Ya! What Del said!  " had a thing on the floor ..."  
    • They been around a long time; make lots of appliances. Saw lots of their stuff in the Dayton's/Macy's.  http://www.trendsettermarketing.net/crux-brings-style-and-ease-to-your-kitchen-available-exclusively-at-macys-and-macys-com/
    • Never heard of that brand but it is a good price.
    • Why do we need those new fangled solenoid things? My 41 Plymouth had a thing on the floor that worked the starter.  And another one for the high beams.  Bunch of sissies!
    • no tanks...............
    • That's exactly what I have in this system. Aluminum insect screen around a 2x2 frame that sits in the blocks along the perimeter of the interior of the box if you see in the construction pictures. 
    • SALE!   https://www.macys.com/shop/product/crux-14636-sous-vide-professional-style-cooker?ID=4890373&pla_country=US&CAGPSPN=pla&CAWELAID=120156340016722258&CAAGID=45680870783&CATCI=pla-380116730066&CATARGETID=120156340018375608&cadevice=c&cm_mmc=Google_Home_Electrics_PLA-_-Electrics+-+Sous+Vide+-+GS_Crux-_-224387946218-_-pg2005863_c_kclickid_82f7e307-d305-4674-8675-393feed1ada3&trackingid=439x2005863&gclid=EAIaIQobChMIyr2tgY7V1wIViWp-Ch3PLAaJEAYYBCABEgJBjPD_BwE
  • Our Sponsors