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  
hoggs222

Yamaha 115 cuts out at low to idle.

Recommended Posts

I have a 2001 Yamaha 115 2 stroke. 1st time out this year it worked fine, then started dying at almost idle. Next time out, it took around 10 minutes to start then ran fine at high speeds, but then started dying at low speed again.

I replaced the plugs around 2 years ago. Not sure if we've ever done the fuel filter. I picked up new plugs and a new fuel filter today.

Do you think these could be the issues?

Thanks,

Hoggs

Share this post


Link to post
Share on other sites

Dirty or plugged fuel filter will cause more of a problem at higher rpms than lower. Plugs are a good place to start. You may also have a little crud in one of the carbs that may have been there before, but now found its way into the idle circuit. Sea foam may help.

Share this post


Link to post
Share on other sites

I don't have any suggestions for you, but do tell us if you find the solution. My old Evinrude 90 Hp has exactly the same symptoms. It was runnine well all season so far until the last time I was out. I'm bringing fresh plugs (2 years old currently), will clean the fuel filter, and have seafom and some spray carb cleaner I will try. If that doesn't work I guess I will be towing her home.

I usually add some Seafom to most tanks of gas and only use non-oxy premo. I guess it would somewhat suprise me if it's the carbs, but it certainly could be. What concentration of Seafoam should I add to a 1 gallon tank? Any benefit to going a little stronger than what is recommended on the can? Any other suggestions out there?

Share this post


Link to post
Share on other sites

You may also have a little crud in one of the carbs that may have been there before, but now found its way into the idle circuit.

I agree with Bruce on this one... sure sounds like something floating around in the bowl of your carbs that gets into the low speed jet from time to time.

I'd try draining the bowls to see if that helps. It can't hurt.

One other thing to check - when it dies at idle, is the primer bulb sucked flat? It could be a weak fuel pump as well, not as likely in my opinion, but certainly a posibility.

Did you run fuel stabilizer through the motor this winter prior to putting it away?

marine_man

Share this post


Link to post
Share on other sites

What concentration of Seafoam should I add to a 1 gallon tank? Any benefit to going a little stronger than what is recommended on the can? Any other suggestions out there?

I'd go with the reccomended rate of seafoam.

marine_man

Share this post


Link to post
Share on other sites

I did run seafoam last winter. I'll check the plugs and fuel filter first.

I can usually get it to run fine in the driveway with the hose hooked up.

Share this post


Link to post
Share on other sites

I have that same motor. Two years ago the same type of symptoms in the early part of the season. I did not however have trouble starting it. Replaced plugs and the primer bulb. It was the primer bulb. Took two bulbs to get a good one from FF. Good Luck.

Share this post


Link to post
Share on other sites

Is the primer bulb (that's the ball to get the gas flowing right?) easy to replace? I'm not in front of it right now to look at it.

Share this post


Link to post
Share on other sites

Pretty easy. My engine has zip ties to remove and pull hoses off the barbs of the primer bulb, A utility knife may be needed if the hoses don't want to slide off. You probably will not miss the 1" of hose that will be removed. Note the size of the barbs for the correct size of a new bulb.

My situation was similar to yours, at open throttle it would run fine, but at slow speed it would be starved for fuel. The bulb had a small crack in it. When the engine was pulling hard the fuel would go. At slower RPM the fuel line lost its "prime" and would starve out.

I'm hoping this easy fix is the solution for you.

Share this post


Link to post
Share on other sites

Well, I tried new plugs and a fuel filter and it still did the same thing. I already bought em so I figured I'd try it anyway. I fired it up and the primer bulb was hard, but would lose pressure. If you kept pumping it, it would keep running.

I am on my way to FF or Sportsmans in the morning to get a new one. I'll let you know if that works.

Mine has a zip tie on one end and a metal clamp on the other end. Any idea if I could just use a zip tie on the end where the metal one was?

Share this post


Link to post
Share on other sites

Yep, It dies if I don't pump the bulb OR kick it to a little higher rpm than idle.

Another note, there were around 15+ specs of sand sitting in the bottom casing of the fuel filter (not sure what it's called). I couldn't see any openings or clogging on the actual fuel filter.

Share this post


Link to post
Share on other sites

As for using zip tie to replace metal one I'd stick with the metal one. The side with the medal one gets more preasure delivered to it so it needs a stronger binding point.

Share this post


Link to post
Share on other sites

I've had 2 yamahas in 19 years . The best their is. Did you try putting fresh gas in the tank sometimes you can get water in the tank. I would get some heet red bottle you can put mulitple bottles in it won't hurt anything. I use seafoam alot I use way more than reconmmended. I don't change plugs very often. Clean them. Use after market hose clamps. The blub was a good idea But you should change the fuel line also.

Share this post


Link to post
Share on other sites

Charley, I was also thinking of changing the fuel line, since I had it out. Sorry forgot to mention that. Thanks for the reminder!

Hopefully I'll be able to hit the big pond in the morning.

Share this post


Link to post
Share on other sites

Ok, so does it die right away or after a couple moments?

If it dies right away, you more than likely do not have a fuel delivery problem. If the pump, line, connectors, etc, are the cause, it would still run on the gas in the float bowl until it runs out.

If it takes a a little while to die, then it could be fuel delivery.

Share this post


Link to post
Share on other sites

It runs just fine at higher rpms. I changed the bulb and it doesn't die anymore, but does seem to run a little rough now. A little sputter every once in awhile. Possibly carbs gummed up?

Share this post


Link to post
Share on other sites

Good news is this points more to a fuel delivery problem. I'd check the clamps/zip ties on the new bulb and make sure they are tight.

Are your RPMs varying at idle or steady? Idle should be around 600-700 RPMs, as a ballpark.

"Drive it like you stole it" as they say and let it have full throttle and gas a few times then check the fuel bowl again and see if any more gunk/sand came thru.

Share this post


Link to post
Share on other sites

Again, not to detract from the original posters problem. Maybe mine is different or maybe it's the same, I dunno.

But my symptoms seem like the same ones (good performance at high RPM's, a definate miss at low RPM and dies at idle). I replaced the primer bulb, and added the recommended strong dose of Seafoam to the gas. I also used some Gum-out spray carb cleaner that I sprayed into the carbs while running. 3 out of the 4 carbs (on an 84 'Rude 90HP) would bog down while spraying in them. One of them did not. It seemed a little better after spraying the gum-out so I then replaced the spark plugs. If it is this jet, is that something that I could service separately, or is the whole carb recommended for changing?

It got progressively better throughout the weekend with the Seafoam in there. It was idling at the end of the weekend (still not quite right though). Do you all recommend continuing the Seafoam to see if I can get the gunk out or do I still need to rebuild the carbs? Sound like it's this low speed jet on one cylinder. Can I replace just the one jet, or is that only done by replacing the whole carb?

Share this post


Link to post
Share on other sites

Older V-4 OMCs only have 2 carburators. You must have been spraying into one side or the other of the top and bottom carburator.

Before going much further, check spark and compression. What did the plugs look like?

Spraying through them while running will not clean anything in the carburator except maybe the throat. Basically, what you were doing was adding fuel to the engine. when you spray and it bogs, typically it means there was already an adequate fuel flow and you just made it richer. If it picks up rpm, it means there isn't, you were acting as the carb. If it does nothing, no change in rpm, I start looking at other things such as the ignition-look for spark on all the cylinders.

The jets inside can be cleaned. If it turns out to be gunk in the carbs, I would suggest that you completely rebuild both carburators with kits. You run the risk of leaning out the engine with dirty carbs. Remember, the only lubrication the engine is getting is from the gas oil mix, and if you starve it of fuel for too long-SQUEEEK!!, time for engine rebuild.

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

    • Hey guys, now that you guys are pulling out your houses to check them over it is also a great time to add the Sure Step.  If anyone has any questions let me know or check out my Facebook page SureStepSD.   Thank you.
    • I've been using the Eagle Claw inline for 4 seasons now and it's always been a good cheaper option.  Never had a real problem with it.  For all the drag issues I hear about it, it didn't let me down at all when I hooked into a 27" lake trout while fishing for rainbows last season.  On that note, I was able to try 13's 6061 reel for a bit last season and that sucker is so freaking smooth that I'm going to get one this season.  If don't want to spend $80 on a top-of-the-line inline like 13 Fishing, the Eagle Claw works just fine at $30.
    • I am all for folks finding and sharing a good deal. Just don't let it be a direct link to another forum. thanks
    • CM, what is Chi doing with Hossa?  If Parise can't go or only can give 75% why not shelf him like Chi did with Hossa and save that cap space.
    • Stealing this idea from the old "Meat Sales" thread, where people share info on great deals grocery stores are currently running. Since we're getting close to the hard water season, I thought we could create a thread where people can share any good deals on ice fishing gear or apparel. Anything goes, if you see a sale on ice fishing equipment and think others might be interested in it, let us know.
    • This is a common misconception with LTIR. I too, thought it meant we "saved" money until I read up on it recently. What LTIR actually allows is for a team to go OVER the cap during a player(s) on LTIR, but once they return, they have to get back under the cap. So, true, it would allow them to spend more, but over the long haul it wouldn't be something they could go out and get someone to fill in without haven't to do something when the LTIR players return.
    • Population is up in NW WI where I hunt public land for deer.  I see grouse every time I go to deer stands or scouting, which is much improved over even a couple years ago.  I just can't get one to stand still for a bow shot, they are very skittish over there.  
    • NW Wisconsin public land.  New scrapes started appearing mid last week.   A couple were freshly hit on Sunday when I was out.  None were very big.    Interestingly I did see a small 6pt buck in the open at lunch time while I was scouting spots, and based on the direction he was going he was working his way to a logging road that had a scrape and tracks on it.  
    • Only made it out for one day for resident opener this last weekend but we had a great hunt. Took the day off and got out yesterday and battled the heat. I almost chose to call it quits early but went slow and took our time but had to take lots of breaks in the field. It was 74 degrees out and if I found water the dog got dunked. Was pretty slow day didn't see a single bird or shoot my first bird until 3:30pm. Ended up shooting all 3 of my birds in the same WIA in the span of an hour. Dog pointed a group of 3 hens in the same spot and then another by itself. Went about 30 yards further and dog locked up. Flushed bird it was rooster and dropped it on the first shot. As I shot 2 other roosters got up in gun range. With just one shell left in my O/U I rushed a shot going for a double, doh. Focused on where downed bird went down and sure enough another rooster gets up in the same spot it went down. Rushed both shots thinking it was the same bird I already knocked down. doh x2 Fortunately dog was able to retrieve first bird so was nice to put one in the vest for our first bird of the year. Took a water break and regrouped as that was a lot of excitement in a short amount of time and dog was overheated. Sat there for about 20 mins and let dog catch his breath. Started working field again and we no more and got started and dog locks up. Flush bird and its a rooster and he only needed one shot before he folded. Retrieved to hand and continued on.   Continue working to end of the property and saw a few more hens and one other rooster that I didn't want to drop over the water and thick cattails. He didn't fly far and hoped to get him on the way back as we walked side we hadn't covered yet. Dog locked up again on the other side and I let the bird get out a ways. Dropped it on the first shot and figured we were done for the day as it folded hard. It ended up being a runner and took off straight for the mud and thick cattails. We tried to track it, found some feathers so thought we were right on it. But once the dog got buried deep in the thick stuff it was just too warm. No scent going through there and he was getting way too overheated so I called him off the track.  We did end up getting our 3rd bird of the day with another nice point and retrieve. Was a good day to be out despite the heat. I spend the rest of the day scouting out other areas to hunt. Put about 350 miles on the truck and other than that one walk didnt see anything else. Did shoot a couple coons though and found a great set of antlers.  Unfortunately I forgot to bring my gopro and only took a couple pics.
    • I have had good luck with the eagle claw inline reel and love the freespool option. I have 3 of them and they all work great.
  • Our Sponsors