Jump to content
  • GUESTS

    If You  want access  to member only forums on FM, You will need to Sign-in or  Sign-Up now .

    This box will disappear once you are signed in as a member.

  • 0

Best fuel to run thru boat motor?


Murdock

Question

I live in the Southern metro, looking for a near-by station that has non-oxyginated fuel available. Is this the right/best fuel to run thru your boat motor and if so, does anyone know where a guy can find a place that provides this type of fuel? ( I have a 35 horse Yamaha tiller on my boat.)

Link to comment
Share on other sites

16 answers to this question

Recommended Posts

  • 0

That is the right fuel to use, and I know on the north metro I get mine at Super America, Amoco and a local little store. I think the Holiday stations have it also.

One other thing -- ALWAYS run your motor dry, if it is going to sit for more than a couple of days. Any of todays gas left in the motor will trash it in about 2-3 years. Then you get to pay $600 to get the injectors replaced and carbs cleaned.

Good luck with your search.

Link to comment
Share on other sites

  • 0

OK...so just unplug the gas line at the tank or motor? and then let die before pulling it out of the water? I have never heard that before.

Link to comment
Share on other sites

  • 0

I never heard that before either. But I just got a boat back in July so doesn't surprise me.

Link to comment
Share on other sites

  • 0

I also run my motor dry after each use. Unplug the line and let her run.

Link to comment
Share on other sites

  • 0
  • 'we have more fun' FishingMN Creators

If you have a small engine that doesn't get used often or used seasonal it's best to use unoxygenated gas with a stabilizer.

I've got mixed feelings on running the carb dry. If you mix your gas/oil and run your carb dry your also running the crank and cylinder walls dry. Moister and lack of lubricant in a stored engine is the main reason for bearing pitting and piston cylinder wall rust. A little rust on a crank bearing will get you about 2 hours of use till it's shot. On the other hand a dirty carb will make and engine run lean which can damage rings, piston, walls and bearings. For short periods of storage I'd say go with a stabilizer. For extended storage use a stabilizer and fog the engine. To fog properly you do so with the engine running, you'll find the instructions on the spray can. After I'm done with the fogging I like to remove the plugs and spray down the cylinders.
Now if you like the bowls dry, drain them manually.

Link to comment
Share on other sites

  • 0

I have had good luck running Seafoam in my small motors that are used infrequently, say once every two or three weeks. It stabilizes fuel, and prevents gumming.

Any longer terms storage that that, I fog the engine.

Link to comment
Share on other sites

  • 0

Thanks for all the info guys.I visited a station that is on the Unoxyginated gas listing. I maybe blind, but am I to look for a specific pump or should I be looking at the octane level? I think I need to look for the higher octane gas, but not certain.Can someone please reply with direction as to what to look for at the pump? Thanks tons guys. By the way, I have found using Seafoam as a stablizer seems to do a better job then many other stablizer products.

Link to comment
Share on other sites

  • 0

Unoxygenated fuel will usually be the highest octane. If a station has it, it will be a single pump, and will be labled as unoxygenated fuel for use in small engines and older vehicles.

Look closely, as there may be other pumps there of equal octane rating that are oxygenated fuel.

Link to comment
Share on other sites

  • 0

Mercury Quicksilver gas additive is what I use on any fill up, expensive but worth it to me.

Link to comment
Share on other sites

  • 0

I'm not a motor tech, just forwarding what I was told by techs at Nelson and Hallberg Marine. I have a 1999 Honda 90hp Tiller and ran it fine for about 2 1/2 years with Seafoam and other additives, but never ran her dry after each use. I had my boat in the shop most of this spring trying to clear up a problem with the mid-range RPM's and then once the mid-range got cleared up, I had NO top end.

I got the carbs cleaned and injectors replaced and was told to make sure and run the gas out, after each use, if the motor would sit for more than just a couple days before the next use.

I was told that "todays gas is just poor quality, and varnishes quickly in the carbs". I still use the Seafoam and stablizers, but I run it dry after each use. I don't know if it will cause other problems, but I would rather not go through the carb prolems again. I will see what the next couple of years bring, and if I go back to the shop for any other issues.

My current pattern is to run it dry at the lake, and then (at home) I pull the plugs and shoot a quick shot of fogging oil into each cylinder -- to provide lube and prevent rust. Only got a three month track record, but so far it's working.

Wish we had a Motor Rep or Tech to answer this one.

Link to comment
Share on other sites

  • 0
  • 'we have more fun' FishingMN Creators

No way will a carb varnish in a couple days. If it did you'd see cars stalled all over on the road side.
Only reason to run it dry is cause most guys arent sure when they'll get out again.
Running a 4 strokes and oil injected engines dry is fine.

Link to comment
Share on other sites

  • 0

Yeah, I doubt it when I hear that today's gas is worse quality than it used to be. I can't image you'll get carb varnish that fast. Sounds like a mechanic who is covering his rear in case his fix isn't right.

But if the non-oxygenated gas is the higher octane, how could it be we should run that in our small motors? I've been hearing for years that small engines are designed to run on normal octane gas, and high octane stresses them.

------------------
"Worry less, fish more."
Steve Foss
[email protected]

Link to comment
Share on other sites

  • 0

Running the carbs dry on pre-mix applications is not good for the motor, as previously stated. The cylinders will need fogging to prevent rusting, even if storing for just a day or two.

Oxidation on unprotected high friction metal takes place fast, especially in summer weather!

On injected motors, the oil is injected at the carbs. So basically when the gas runs out, the engine kills, and oil quits pumping. Oil may be injected a split second longer, but odds favor the majority of it will remain in the carbs. Over long storage times, slight amounts of sludge can develope of some of this residual oil and plug orfices and jets, and your cyclinder walls will still be dry and end up oxidizing.

By "running the motor out of gas" you still leave residual fuel in the carbs, in nooks, crannys, orfices, where its not wanted. The less gas in there, the quicker it goes stale and varnishes.

The best way is to treat the gas with a good additive, for short or long term storage.

Sea-Foam or Sta-Bil will work well, but make sure to run the motor long enough after treating the gas so it makes it through the fuel hose and the carbs and the motor fires off on the treated gas. This way, you can leave the carbs full, and shut the engine down normally.

For long term storage, pull out the plugs, shoot a 3 second shot of fogging oil in each cylinder, and turn the engine over for 3 seconds with the plugs out. Replace the plugs, and she is good to go.

On short term storage, fogging is not required, as the cylinders have enough oily residue to prevent too much oxidation to cause harm. However, keep in mind that over time with the motor tilted up, enough of the oil could run back to create vacant areas of petroleum protection on your cylinder walls.

After writing all this, it seems pretty outrageous, as most people don't even think of any of this stuff and never have a problem. 1,000's of hours, year after year, and life is good.

On the note of gasoline and octane ratings...Octane is a measurment of fuels resistance to burn. The higher the rating, the more compression and hotter spark it will require to ignite the fuel.

Most engine manufacturers state the use of 87 octane fuel.

Ufff Da. I am winded now.

------------------
Good fishing,
UJ
[email protected]

[This message has been edited by united jigsticker (edited 08-24-2003).]

Link to comment
Share on other sites

  • 0

So should a guy add the proper amount of sea foam EVERY time he fills up? If he takes the boat out say, once or twice a week?

[This message has been edited by Dano2 (edited 08-24-2003).]

Link to comment
Share on other sites

  • 0
  • 'we have more fun' FishingMN Creators

Dano I put a stabilizer in if I think I wont be using the gas up in the tank within a couple weeks. It shouldn't hurt to add stabilizer whenever you gas up.

Link to comment
Share on other sites

Guest
This topic is now closed to further replies.


  • Your Responses - Share & Have Fun :)

    • kaparzo
      We fished Thursday - Saturday. Couldn’t get any marks to bite on the west end so started east. Caught lots of 9-15” eyes on the mud side of the transition. Mostly crawlers for us on Thurs-Fri but bite changed to minnows on Saturday. Our rainbows ran small but had a few big chubs mixed in. Big chubs we’re best. No eyes on small suckers.  A jig and sucker or crawler on 9-14’ rocks got smallies going in several places. Rocky points coming off islands also produced smallies with tubes, deep jerkbaits and ned rigs on east end. Also landed a 45” ski on a crawler harness. 
    • MarcoGrune
      Hello. Another important factor to consider when looking for an writing service is the amount of work they can do. A company like https://payforwriting.com/pay-for-papers/  offers a wide variety of topics and has over sixteen writers who are experts in the subject matter. The service also offers proofreading and editing services. Prices start at , but they can get expensive quickly if deadlines are tight. 
    • VitalikPaliy
      Hello. The first step is to read reviews written by customers. This way, you can determine if a service delivers on time and does not charge hidden fees. The paperwriter reviews should also state whether or not the company guarantees original work. Some of the most reliable review platforms include Trustpilot and SiteJabber. Moreover, many  writing services publish their customer reviews on their websites, some even in video format.
    • MarcoGrune
      Hello. Remember, cheap writing services will not pass a plagiarism scan and lack quality.  When looking for an college papers writers , you can look for online reviews that compare several companies. Those reviews should include both positive and negative feedback from customers. The service you choose should also provide timely delivery and no hidden fees. Additionally, it should guarantee that every paper is original. This way, you can be sure that you are getting a high-quality written by a competent writer.
    • MarcoGrune
      HelloHello. Another great option for students looking for a quality writing service, college paper is a legitimate company with a reputation of providing exceptional quality papers. This website has been in business for seven years, and it has a rating of stars. The service offers a loyalty program and provides discounts to existing customers. 
    • monstermoose78
      It was a perfect day for a walk with the dogs. 
    • Dan85
      Sounds like a fun day Moose. The weather was just about perfect for the days event. 
    • Larson333
      I also don’t really believe that you can earn online casinos. There you can play, put bets, win and more often lose money. In the casino for Norway, the same rules apply as for the rest of the casino. If you are lucky, you will win. But to earn money, it is unlikely.
    • monstermoose78
      Went duck hunting at my dads house I missed the only duck in range. The we went grouse hunting and we put 6 miles walking in and flushed two grouse and a woodcock. 
    • leech~~
      Beat yea!   Different lake though.  👍    
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.