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Post by clydo on Jun 25, 2014 7:03:22 GMT -6
I have a 206 CC and it has a Yamaha 150 4 stroke on it. Seems to idle fine and run fine, but when i get into docking situations it stalls when going from neutral to forward in slow speeds. It stutters a bit then the engine cuts out. Gets pretty hairy in currents and i am going into boats as my engine conks out. I had my mechanic do a full tune up, plugs, VST filter, oil change. But still seems to be happening. So then he did a throttle adjustment but still happening. Any suggestions?
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Post by clydo on Jun 25, 2014 7:10:39 GMT -6
I also had the fuel injectors cleaned
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Post by T-Topless on Jun 25, 2014 7:45:56 GMT -6
Try emptying your fuel-water separator and putting in E-Free fuel ...
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Post by clydo on Jun 25, 2014 8:40:23 GMT -6
I'll give that a whirl. I did put in Sea Foam and Star tron Fuel Stabilizer
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on Jun 25, 2014 10:35:56 GMT -6
There is a fuel idle control valve on there that you might check after you check on T-Topless's suggestions (his costs WAY less so do that first and see if you get anything). My uncles f225 was idling very rough and stalling two or three seasons ago. We brought it to the dealier and they telling us it needed injectors, but we knew better.
After i read 10000s of forums we decided to try the fuel idle valve. Back then i had a F225 as well so we just used the part from mine to test it, found that was the problem, then bought to new part and installed.
I dont know that its really an issue with the fuel tho if you are idling and running fine. I remember reading alot about an electric swtich that goes bad on the motors causing them to stall only when shifted into and out of gear. If you throttle only out of neutral either way and then bring it back, does it stall? If no, then im going with electric switch, if yes then im thinking fuel.
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Post by clydo on Jun 25, 2014 11:27:20 GMT -6
you are correct... just when engaging into gear it sputters and cuts out. If i go into gear fast it won't.. but in docking situations in current i need to go in slow which creates a problem.
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Post by T-Topless on Jun 25, 2014 11:53:58 GMT -6
I'll give that a whirl. I did put in Sea Foam and Star tron Fuel Stabilizer Sea Foam and Startron do nothing to prohibit Ethanol from collecting water and phase separating. Once it does, its in your tank and fuel/water separator until you physically remove it. Quick check is to hook up small tank direct to engine with new, E-free fuel and see how it runs. If you remove your bad fuel, there is a good waste ethanol fuel repository at 1600 Pennsylvania Ave NW in Washington, DC.  |
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Post by clydo on Jun 25, 2014 13:04:12 GMT -6
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on Jun 26, 2014 0:20:15 GMT -6
If you throttle only out of the neutral position, into gear, and then back to neutral position does it stall?
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Post by T-Topless on Jun 26, 2014 5:57:09 GMT -6
Too bad you can't get E-free there. The Startron information is very misleading. It says: " Increases octane and removes water from the fuel, making it the perfect solution to prevent and eliminate ethanol (E-10) fuel problems." If it removes water, then where does this water go? I'm sorry but it does not remove water - the water is still in your tank. One of the few things that will absorb water is ethanol, which is how we got the water in the fuel mixture in the 1st place. Nothing will prevent fuel with Ethanol added from: 1) absorbing water and 2) phase separating over about a 3 month period. That is simply a fact with alcohol. Always good to add some Startron and Stabil, but if you let E-Gas sit, it will have water in the bottom of the tank and phase separated "junk" that will not burn in it. Combine this with old gasoline (which ends up with very low octane levels so it burns poorly), and you have a real mess.... |
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Post by clydo on Jun 26, 2014 10:46:44 GMT -6
usually happens when running it for a little bit and then docking situations going in and out of neutral to reverse and forward, but usually stalls in forward at real slow speeds. I was actually out drifting in neutral why fishing for mackerel for about 20 minutes and then popped it in forward and it stalled twice while doing that.
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Post by clydo on Jun 26, 2014 10:48:19 GMT -6
Too bad you can't get E-free there. The Startron information is very misleading. It says: " Increases octane and removes water from the fuel, making it the perfect solution to prevent and eliminate ethanol (E-10) fuel problems." If it removes water, then where does this water go? I'm sorry but it does not remove water - the water is still in your tank. One of the few things that will absorb water is ethanol, which is how we got the water in the fuel mixture in the 1st place. Nothing will prevent fuel with Ethanol added from: 1) absorbing water and 2) phase separating over about a 3 month period. That is simply a fact with alcohol. Always good to add some Startron and Stabil, but if you let E-Gas sit, it will have water in the bottom of the tank and phase separated "junk" that will not burn in it. Combine this with old gasoline (which ends up with very low octane levels so it burns poorly), and you have a real mess.... I have a 4 stroke, and believe there is a water filter/separator off the gas line correct? Shouldn't that help expel any water out of the gas? |
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on Jun 26, 2014 12:06:06 GMT -6
Got it. What im trying to pinpoint here is if it is actually a fuel problem or if its electrical. Next time your at the boat hold down the throttle only switch and move the shifter from neutral position to gear and back, then vice versa (do it a few times and play with the amount of throttle you give it). If it stalls then were leaning towars some fuel problem (and when i say fuel problem im not talking just liquid fuel , im talking about one of the many parts that get fuel into the motor).
Ok, if i remember correctly from what i read in the past trying to find that idling probelem, there is a swtich on the yamaha that prevents the motor from starting if the boat is in gear, problem with my statement is i cannot remember what sequence caused the stall (neutral-gear/reverse or gear/reverse to neutral), google "yamaha f150 stalling when shifted" and a bunch of stuff pops up, i jsut dont have the time to really run through them without having the boat by me to play with differnt things.
You can also take the cowling off and shift the motor at the shift box. If it stalls then you have a problem with the motor, if it does not then you have a problem with the electronic shifter/cables.
Sorry if i am a little vague here, its been a while since i had to run through the problem and all of the forums.
Good Luck!
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Post by clydo on Jun 27, 2014 10:44:44 GMT -6
thanks! I will give it a whirl!
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on Jun 27, 2014 12:22:13 GMT -6
No problem, its a big game of trial and error trial and error.
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Post by T-Topless on Jun 28, 2014 7:28:07 GMT -6
Hook the motor up to a small tank of fresh E-Free gas and see if it runs OK.
If it runs better, its the gas in your tank.
If not ... something else.
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Post by clydo on Jul 1, 2014 6:59:26 GMT -6
SO.. ran the fuel down to below a 1/4 of a tank and refilled with all new gas.. and treated with star tron stabilizer.
Went out twice over the weekend and ran the engine for a 30 min ride and got to my mackerel spot and threw the engine in neutral and it runs great in neutral and high speeds.. then when i am drifting around and need to move really slowly to avoid lobster traps i put it in gear (forward) at a low speed and it cuts out. Happened ever time. But if i give it more juice so it jolts the boat forward it doesn't cut.
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yolo
Ensign
Posts: 626
Location: Back to Manasquan Inlet, NJ
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Post by yolo on Jul 2, 2014 10:15:59 GMT -6
Ok so youve tried fuel. New fuel and cleaned injectors, thats the first step in troubleshooting this.
Did you try taking the cowl of yet and shifting it at the motor?
You have to start isolating the problem if its electrical (shifter to the connection on the motor) or if its in the actual motor.
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Post by Simple Man on Jul 4, 2014 5:13:22 GMT -6
Is the lower unit in good shape? I've seen a guy with a lower unit going out that would do that. Good thing was that it didn't take long for the problem to manifest itself.
If it was carbureted I would say your carbs need rebuilding. My money is still on the fuel system some kind of way though.
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