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.

  • 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!!!

Sign in to follow this  
Fishing Junky

How to run two outboards off one tank?

Recommended Posts

Fishing Junky

Howdy Guys. Can anyone steer me in the right directions on making up a gas line that I can run a 25 Honda and a 8hp Yamaha both fourstrokes on one gas tank? What parts would I need and where to get 'em? Any pictures of a hose on the net I could look at? Any help would be greatly appreciated. Thank you. Junky..

Share this post


Link to post
Share on other sites
Capt. Don*

Ok, I run two outboards on my boat and have 2 150 gal tanks, with the manifold system from the factory I can run either engine from either tank or both in any combination I choose. The system is simple, you need to install a 3-way valve from your tank and connect both lines to it. You now can select which engine will get fuel. It you don't want a selector valve you can install a tee at the tank pickup and attach each fuel line to one leg of the tee. As long as the connections on each end are air tight the engine that is running will get the fuel, or both engines running at the same time for that matter.

Tempo products supplies most of the fuel fittings to the marine manufacturers, look here...[Note from admin: Please read forum policy before posting again. Thank you.]

Share this post


Link to post
Share on other sites
Fishing Junky

Thanks for heading me in the right direction CD. Appreciate it. Junky......

Share this post


Link to post
Share on other sites
Valv

Actually you cannot have a Tee to feed both tanks.

You need a 3 way valve, otherwise the motors will always try to suck from each other and get air in the system.

Share this post


Link to post
Share on other sites
Fishing Junky

Valve. Wouldn't the valve in the bulb in the motor that wasn't being used prevent that? If not, what would be the fix on this setup, besides the 3way valve? Thanks for the help.

Share this post


Link to post
Share on other sites
Valv

Fishing+Junkie, the bulb on motor is not enough to stop air flow from motor.

Somebody brough up this question some time ago, and also was the cause of a malfunction for some members with that setup.

You need a valve that stops completely the flow from the "unused" motor. You can try to see if it will work with your setup, it migh be possible, then if it doesn't work you'll need a valve.

Share this post


Link to post
Share on other sites
Capt. Don*

Lets think about this. With a tee and check valves in the primer bulbs, the running engine will draw fuel from the tank and through the tee, in order to overcome the check valve in the primer bulb, the supply from the tank would have to have a restriction equal to or greater than the vacuum needed to break the seal on the check valve or the clamps on the barbed ends of the fuel line connections and draw air in. This doesn't seem very likley to me. I think it is worth a try.

Share this post


Link to post
Share on other sites
Valv

Don, you can try all the theory of this world, there are members here that went thorugh this same issue and only way out was to get a valve. I've never done it before so I cannot guarantee that's what's needed in this case, but since he has to cut fuel line anyway as might as well try just a Tee, if it doesn't work there is always plan B (the valve).

Also if he has a portable tank he can switch between motors with no problem, he could buy 2 quick connectors to the tank and swtich between motors.

Share this post


Link to post
Share on other sites
Fishing Junky

Fight nice boys. grin.gif Just kiddin'. I see both of your points. I guess I should just go with the 3 way valve. Hoping to just plug in the lines to the motors and call it good, but if the tee doesn't work, then I just wasted money on the tee. The valve would require one more move, select what line to draw, but that's not so bad. Thanks for your insight both of you. I thought I read a topic on this subject, but went all the way back into the May threads and didn't find anything. Also a search was no luck to me. Thanks for the links to valves and connections also. I searched the net and had no luck, so again, thanks. Junky...

Share this post


Link to post
Share on other sites
marine_man

You'll either need a three way selection valve (where you select which line gets the fuel) or connect directly to a fuel tank pickup (I've heard of some guys bypassing their reserve valve on the Lund Pro V's, Tyees, etc) and connecting the lower pickup to the kicker motor)

Valv is right...

marine_man

Share this post


Link to post
Share on other sites
Capt. Don*

Now I am curious, not only if the tee would work or not, but if not why? As I stated earlier, I run two outboards, 225hp which draw a much higher volume of fuel than FJ's. I have two 3 way valves, one for each tank, if I choose to run the both engines off of the port tank, for instance, ( which I've done numerous times for many miles), I have nothing more than a tee feeding both engines. I ran 145 miles today w/twin diesels drawing off of a single tank with not two pickups, but, you guessed it, a tee. I don't know how Lund tanks are configured when it comes to reserve and main pickup, but I would guess that the reserve pickup just drops lower into the tank, much like bigger boat tanks which have shorter fuel pickups for generators and deeper pickups for propulsion engines. I am certainly not trying to fight as FJ kidded, but I want to know why something I do regularly isn't supposed to work? Have I really been just this lucky, if so, whats the powerball jackpot worth now?

Share this post


Link to post
Share on other sites
Fishing Junky

CD, I should have told you guys that I have a portable 6 gallon tank in my boat. 2006 Lund 1625 classic. It is my BWCA boat. I don't have room to run even a seperate 3 gallon tank for the kicker. I want to run both motors, which are very fuel efficient, off my one portable tank. I could do what Valv said and just switch gas lines, but would rather have it so I can run either motor without the hassle and slight gas leak changing lines. I hope I'm not making a mountain out of a mole hill here. Just trin' to get some ideas. And I thank you very much for your input as well as Valv's and others. Junky.....

Share this post


Link to post
Share on other sites
Surface Tension

As with most things there more then one way to do something. A check valves intended purpose is to keep gas from flowing in one direction as you prime the line and fill the carb.

You can use a T but your relying on both check valves to be operating at 100%. So as long as the check valves in the primer bulbs are good then you won't have a problem. Thing is these valves don't last all that long and eventually will let some gas go by. Used on a single line its not a problem and you won't notice a leaking valve till it shot completely. Hook up a T and you will start back drawing gas through a check valve thats not 100%.

Another way to do this which is also intended and recommended for this application is the 3-way valve. Now your not relying on check valves.

Share this post


Link to post
Share on other sites
Valv
Fishing Junky

Wow Valv, ya didn't have to go through the trouble of finding those links, but I do appreciate it. I read through all of them and great info. I'll just go with a three way and be done with it. I really appreciate everyone's help. Good stuff. Junky.....

Share this post


Link to post
Share on other sites
Bigeye30"

Wow thats interesting never knew that could be a problem but I will say that I currently just use the T system on a 100 Horse Yamaha 4 stroke and T off to a 8 Horse Yamaha 4 Stroke Never had a problem for the past three years but do know now if that ever becomes an issue whats probably causing it, I switch between the two motors quite often and even have the 8 horse disconnected through out the year but like I said Ive personally never had an issue with it.Thats just my experience

Share this post


Link to post
Share on other sites
Valv

FJ it wasn't troubles, being on this forum for many years I remembered the issue and did a quick search.

As I said I cannot tell you how to do it since I never installed anything like that, let us know how it turns out.

Share this post


Link to post
Share on other sites
Fishing Junky

Won't be till next spring Valv, but will come back and tell everyone how it went. Thanks again, and to all. Junky....

Share this post


Link to post
Share on other sites
kjgmh

Another good option is to mount a fuel filter/water seperator. You can run 1 or 2 inlets and 1 or 2 outlets with no problems. This will also prevent any debris or water from gettting to your motors. Yamaha has a nice little one that would work great in your application.

Share this post


Link to post
Share on other sites
kjgmh

Capt Don, one thing to consider is that the motors FJ is dealing with are both carbed. This makes it much easier to suck air from the other motor. On your diesels it is a sealed fuel system and much harder or maybe impossible for this to happen. Not sure on your 225's but on most of the newer ones they use a vapor seporator tank which also makes this harder to happen. If you are running both motors at the same time, which it sounds like you are doing, this also is not an isssue.

Share this post


Link to post
Share on other sites
Capt. Don*

Hello, the points you raise are well taken, however, the primary point I contest here is that the fuel needed will be supplied from the tee. Air has nothing to do with it unless there is something else wrong. In order for one engine to starve for fuel the supply would have to restricted enough for it to try and draw fuel from another source, the old path of least resistance if you will. That means overcoming check valves, hose clamps, needle and seat in the float bowl etc. In a situation where everything is good, this won't happen because the path of least resistance is from the tank through a tee and into the engine. Have you ever had a vapor separator tank on a newer outboard apart, I have, you know whats in there, a float, a needle and seat and the pickup for the electric fuel pump, just like a carb bowl. The fuel supply pump is still the same old crankcase pulse style diaphram pump that was used on the ol' 1970 Johnson Sea-Horse. I guess some things don't need to change. I have been astounded by the number of posts provided by Valv of people who use this system and claim no problem, yet are convinced that there must be something to it because they heard about someones cousin had a friend whose mother had a grandson who... you get the picture. And to think that if everything was fine for 3 years of operation and a problem developed there would be a need to add a part that wasn't there before to solve it? I don't understand the thinking, I posted this info for FJ because it works and via other posts it has worked for them, not to try and debate with people who provide no basis in fact. I have experience with it, I understand it, and it works. As far as diesel fuel systems and air....I don't even want to go there.:)

Share this post


Link to post
Share on other sites
TSCTSC

Fishing Junky,

I was the poster in one of the links that Valv put up. I have come quite a long ways since I posted those questions. Boy, was I green, and boy, did I get such great help from this site. Thanks again to all those that helped me along. Was like going down memory lane reading that old post. Hehe. Thanks Valv.

In any case, I chose not to go with a T valve. The T-valve is the least that you should go with if u do not want to potentially screw your motors. I assume that they are both 4 strokes.

Currently, my fuel set up is from my internal fuel tank to a fuel water separator. This allows a 1 in and 2 out fuel line. All my motors are Yammy but for some reason, the dealer who is Yammy installed a merc fuel water separator for me.

The way I see it, it serves two great function. It streamlines my fuel delivery, and it also filters my gas. Perfect. Have been running it like this for 6 months with no problems at all. That was why I went with the fuel separator route. If u buy the motor from the dealer, get them to install all of it for you. It should be free then. Also, mount the separator outside in the splashwell so that u can access it easily. Mine is on the port side of the splashwell at the back of the boat.

Share this post


Link to post
Share on other sites
Valv

Don , the point is why take a chance when you don't have to. I guess this will be a factor of decision when hiring somebody to take you out on a large body of water.

I am NO expert, I just use common sense, and it got me many places, the basics of this debate is common sense, if you decide not to see the other face of the coin, that's great, I have no problem with it but don't give any suggestion based on your "theory".

When I write on a thread I know what I am talking about or I don't even bother writing , I am always responsible for what it could happen to somebody when replying, and/or if I don't know much about an issue I warn people about it.

The Internet is a very powerful media, you will be surprised how many people read every thread and take conclusions, it's not just a couple of guys debating. If you are comfortable assuring somebody that your idea is the actual fact, that's fine for me too, but I would at least offer to come at rescue if it doesn't work, right ?

OK, now the issue has been partially resolved, pending a reply from F.J after he tries the suggestions (lots of pressure on you Fishing_Junky :grin )

Let's put down the war axe and go get some fishing done, that's what this Forum is all about

Share this post


Link to post
Share on other sites
Capt. Don*

Valv, you are absolutely right, chances should not be taken when not needed. Frankly it doesn't matter to me which method is used as long as it works and is a simple install.

On another point, are you insinuating that I take chances with my boats or passengers based on the information in this thread? I certainly hope that is not the case. My boats have traveled over 15,000 miles and carried over 6000 passengers this season with out a single mechanical failure or incident, I feel this record speaks for itself. I am no expert myself, but experience and knowledge have served me well. I am a maritime professional and have the documents and service records to prove it. I would like to invite you to fish with me next season, you'll gain a whole different perspective.

Thanks

Share this post


Link to post
Share on other sites
Fishing Junky

Hey Guys. I have all the neccasary hardware to build my fuel line. My next question is: Can I use regular teflon tape on the brass threads were I need to hook up to my 3-way valve? If not, what should I use? Thanks again for the help. Junky....

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 :)

    • oilandwater
      Have heard of very few.  An occasional rainbow (looper and steelhead, make sure to learn the difference) mixed in with the catch in Two Harbors, along with lake trout near the bottom on the right day.  I've seen a few cruising under the ice in McQuade, but pretty slow there.  Rainbow action will pick up as spring progresses. 
    • smurfy
      sheez got that right!!!!!!!!!
    • hunterdown
      I might be able to make this, I think Jr. will have the time off as well....so, maybe him and I?
    • Rick
      Spring turkey hunters hoping to bag a tom during the first two weeks of the season have until Friday, Jan. 26, to apply for a lottery permit. The season runs from April 18 to May 31 and is divided into six hunt periods, A through F (see table below). Hunt A and B licenses for firearms hunters age 18 and older are limited in availability and assigned via lottery drawing. Turkey lottery applications cost $5 and can be purchased online at mndnr.gov/licenses, by phone at 888-665-4236, or in person from a license agent. Successful applicants will receive a postcard in the mail by mid-February and can purchase their hunting license starting March 1. Firearms licenses for hunts C, D, E and F are not lottery-limited and will be available for purchase over-the-counter beginning March 1. All licensed turkey hunters can participate in Hunt F if they have an unused tag from one of the earlier hunt periods. Archery and youth hunters (under 18) are exempt from the lottery and may purchase a spring turkey license valid during all hunt periods, including hunts A and B. Surplus lottery licenses from hunts A and B, if available, will be sold over-the-counter starting in mid-March. Visit mndnr.gov/hunting/turkey for more information about turkey hunting in Minnesota. 2018 Spring Turkey Hunt Periods
      Hunt A: April 18 – 24
      Hunt B: April 25 – May 1
      Hunt C: May 2 – 8
      Hunt D: May 9 – 15
      Hunt E: May 16-22
      Hunt F: May 23-31 Discuss below - to view set the hook here.
    • Rick
      Youth and adults can learn to hunt turkeys this April with experienced volunteers who will cover safe hunting techniques, how to call-in turkeys, hunting tactics and field dressing a bird. “We teach the skills and techniques that allow new turkey hunters to become lifelong hunters,” said Mike Kurre, learn-to-hunt program coordinator with the Minnesota Department of Natural Resources. “This has been a successful program and as a bonus, we love hearing how former participants go full circle to teach others how to hunt.” Participants can apply through Monday, Feb. 12. The hunts are Saturday, April 21, and Sunday, April 22, and provide opportunities to access locations that may otherwise be closed to hunting. “We get volunteers from the National Wild Turkey Federation and this is the 16th year we’ve cooperated for these hunts,” Kurre said. “Over the years we’ve introduced more than 5,000 people to these hunting experiences. We also work with the Minnesota National Guard to get military adults and their families into turkey hunting.” Details about how to apply and costs to participate are available at mndnr.gov/turkeyhunt. A pre-hunt orientation is required and all participants will need to have a valid firearms safety certificate or its equivalent. Youth must be accompanied by a parent or guardian. Overall participation in the hunts is restricted by the number of volunteers and private lands that are available. Anyone interested in providing turkey hunting land for the mentored youth hunts should contact the Keith Carlson, Save the Habitat Save the Hunt coordinator for the National Wild Turkey Federation in Minnesota at kcanoka@comcast.net.   Discuss below - to view set the hook here.
    • Rick
      Gov. Mark Dayton has proclaimed Jan. 20-28 as Snowmobile Safety Awareness Week in Minnesota. This an opportunity for the Department of Natural Resources, volunteer safety instructors, the Minnesota United Snowmobilers Association (MNUSA) and its 250 member snowmobile clubs to join together to recognize the importance of safe, responsible snowmobiling. “It’s a fun and exciting activity, but snowmobilers should always remember to make safety a top priority,” said Conservation Officer Bruce Lawrence, DNR recreational vehicle coordinator. “They should also always use common sense and keep a clear head when riding.” Here are some other key safety points: Snowmobiling and alcohol don’t mix – don’t drink and ride. Smart riders are safe riders – take a snowmobile safety training course. Always wear a helmet and adequate clothing. When night riding slow down – expect the unexpected. Know before the ride  – always check local trail and ice conditions. Cross with care. Know risks and be prepared – make every trip a round trip. One is the loneliest number – never ride alone. Ride safe, stay on the trail – respect private property. To legally ride a snowmobile in Minnesota, residents born after Dec. 31, 1976 need a valid snowmobile safety certificate. Options for both classroom and online classes can be found at http://www.dnr.state.mn.us/safety/vehicle/snowmobile/index.html People can find Minnesota snowmobiling events and activities on the MNUSA webpage: https://mnsnowmobiler.org/get-involved/mnusa/events. Discuss below - to view set the hook here.
    • eyeguy 54
      sounds like a hoot. hope to get there. 
    • Roscoe010
      Hi Wanderer, I am going up this weekend too.  Glad the weather will be warm! I will try a different pit this time, but had good luck last year.  I hope the fish will be active and hungry.
    • IceHawk
      Thanks Rick! Jeff hope to make it always a good time and laughs when you get a group of great people together. I usally do more jaw jacking  then fishing at these things but for me its just as much fun 
    • Rick
      I will donate a few goodies. I will send it to @Tom Sawyer if he messages me his address.
  • Share & Have Fun