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
Chapo

Yamaha 115 / 4 Stroke ?'s

12 posts in this topic

I recently bought a boat with an 02 Yamaha 115, 4 stroke. No manual with boat and previous boat owner had everything done by the marina. This is my first 4 stroke, the questions I have is:

What octane fuel is best to use?

What viscosity oil to use/would full synthetic be better?

What to use for the lower unit?

What has to be done for winterization?

Thanks for your help.

Share this post


Link to post
Share on other sites

Use non-oxy gas when possible

10w-30 Marine 4 stroke oil-High quality major brand

Marine Gear Lube-High quality major brand

To winterize, Stabalize the gas, change gear lube, engine oil and filter, fog engine, grease all zerks and drain the VST tank (vapor separator)

Share this post


Link to post
Share on other sites

Chapo....good questions! Pending the checkout at a dealer tomorrow I may also have an 02 Yamaha 115 4-stroke in my garage this weekend. My first boat so great timing on this post!

Share this post


Link to post
Share on other sites

I have a 03 Yamaha 115 4 Stroke and love it. I run Amsoil 4 stroke oil in it and their lower unit oil. I run Premium gas most of the time but I go through a lot of gas so regular unleaded is used often too. I just wouldnt run it all the time I guess.

If you dont like Amsoil than just run the Yamaha Oil.

When I winterize I put Stabil in the tank and run the boat for that last day out. I then change plugs and change filter and oil and lower unit lube. Make sure you drain all the water out of the boat and livewells and grease trailer and charge batteries up. I keep them in the boat in the garage and charge monthly. Take all graphs inside.

If you have mice around put dryer sheets in all storage.

Share this post


Link to post
Share on other sites

The VST is behind the intake manifold. There is a slotted drain screw at the bottom of it.

Share this post


Link to post
Share on other sites

Just do a search for Yamaha on the net, and you can download the exact manual you need, for free. I know because I did it this past fall when I got my new setup. I didn't print it out because it is like 80 pages, but I saved it on my laptop if I need to look at it. All of those questions are of course in the manual.

Share this post


Link to post
Share on other sites

Just do a search for Yamaha on the net, and you can download the exact manual you need, for free. I know because I did it this past fall when I got my new setup. I didn't print it out because it is like 80 pages, but I saved it on my laptop if I need to look at it. All of those questions are of course in the manual.

Just FYI... I don't think you can print these manuals. Something in the PDF that won't allow it. But yes, you can download them and save the electronic copy on your PC.

Share this post


Link to post
Share on other sites

I know there have been other posts, but how much harm will using a non-marine synthetic oil in a four stroke cause? Can Mobile 1 sythetic be used safely in a Yamaha f150?

Share this post


Link to post
Share on other sites

I would go with what's recommended. Its cheaper than a new motor. (I also agree with marine_man

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0



  • Posts

    •   All good things come to an end sometime. At some point we realized that the cabin that we always wanted just was not going to happen for us. So, for less then just the taxes and cost of up keep on a cabin we have a park model camper where we can have family and grand kids come up and go fishing any weekend we want. Plus lots to do around the Brainerd area if you don't want to sit in the camper on a rainy day. Last weekend we ran up to Walker to Reeds and pick a gal of Blue Berries on the way.
    • We had our permy site for 14 years. It was a blast the first 10. Neighbors changed, other things changed. We got tired of it and finally had enough. It was getting so with the yearly fee we felt we needed to be out there every weekend.   I still fish the lake in the fall but don't miss it. Now we can go to other places to do something different. With that said I'd do it all over again.    
    •   Well after inspecting, I'm really starting to lean that the blade mounts are bent. I can't find any pictures or anything......so I'm not sure. If these just take a normal shaver blade.....then they gotta be bent.....Anyone have any insite?
    • On June 30 I sent the dnr an email this is their response, "Hello Rob,
      The hunting regs will be out the last week in July"
    • I agree about the lodge. After gear and any snow it can become a heavy pull. The lodge fit in my 1500 chevy silverado (6.5 ft box) as long a you put the flat end of the tub to the front and when closing the tailgate you had to pick up the end of the sled just a little for the gate to close. 
    • When the heck do they issue them? Seems to be getting late. I'd like to know what kind of slaughterhouse Zone 1 will be, or if they are going to play it smart and continue being a bit conservative 
    • Definitely plan on doing some pulling by hand ealry ice so I'm thinking the cabin it is then. Thanks for the tips and info on the otters and equipment it's been a very big help!
    • Yep, I've contacted 4 or 5 campgrounds in the last couple of days. One has gotten back to me, the rest have not yet.   We will be up that way over the Labor Day holiday so we can check out a few campgrounds while we are there. We actually checked out 2 or 3 while we were up there last year at that time.   I'm not too sure if we are ready to take the plunge yet or not but we are close.
    •   If you are start talking to the owners of the campgrounds now about letting you know when there may be an opening. Ours fills up during the summer but at the end of the season the owners will start hearing about those that will be moving out at the end of the year. Lot's of relatives will tell their families as soon as they hear someone is moving out. Good Luck.
  • Our Sponsors