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 Post subject: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 5:27 am 
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Last year with only 40 hours my new 250 Suzuki was starving for gas at 5800 rpm. Motor would run great but at WOT after 30 sec motor would back down at 4000 rpm. Never stalling. Just backs down to a lower rpm. I don't run motor at WOT but when I do I only do it for less them 1 min. I started checking vent- pulled the gas sending unit out and checked gas tank. R&R 10 M filter. Still having problems. I took the boat to a Suzuki mechanic. Got hit with a $800 bill. They check the tank. All good. Vents. Replaced the gas line from tank to motor. Replaced the primer ball. Replaced the gas tank valve. Road tested and still having problems. The motor is not over rev. rpm. She is at 5800 wot. The mechanics replaced both primary and secondary filters and problem fixed. This year I put boat in water and problem started again. Now I'm going to order the two filters in motor. I did go 600 miles and over 200 hours since last year. Hoping the filter fixed this problem. Is this normal? Are those Suzuki filters that sensitive? I always use addictive in the gas.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 3:00 pm 
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Location: Pensacola, Fl.
So here's my question........ Did you clean the tank before installing this motor?

Sounds to me like the filters are doing their job.... You just have a LOT of Crap in your tank.

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 4:14 pm 
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warthog5 wrote:
So here's my question........ Did you clean the tank before installing this motor?

Sounds to me like the filters are doing their job.... You just have a LOT of Crap in your tank.

Yes, gas tank was checked and clean when motor was installed. Last year when this problem started the Suzuki Mech pulled the sending unit and checked. He said tank looks like a new tank inside. He drained all the gas also. That bill was )$800. I ran the boat today , she runs fine. I didn't do anything yet. I stayed at 4000 rpm max. At 5800 she will starve for gas. I'm thinking high pump? Try to get the Suzuki mechanic to warranty that!!! Joke


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 4:18 pm 
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warthog5 wrote:
So here's my question........ Did you clean the tank before installing this motor?

Sounds to me like the filters are doing their job.... You just have a LOT of Crap in your tank.

Thanks for answering back. I was hoping you would read this. I don't know what to do. The Suzuki mechanic is going to do everything and replace everything on boat side but not the motor. Last year I hooked up a 6 gall tank and it still starved for gas. That told me it's the motor. I told that to the Suzuki Mech. He still replaced all gas line- gas bulb- sending unit. Why???? That piss me of.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 6:33 pm 
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Location: Greenwood, Indiana & Charlotte Harbor, Florida
what is the fuel pressure on the rail? Has the injectors been checked on a machine?

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 6:55 pm 
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Location: Greenwood, Indiana & Charlotte Harbor, Florida
Any codes?

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 7:32 pm 
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Location: Newport, NC
There is also a very small screen filter in the fuel vapor canister. Its only about the size of a large pencil eraser so it could possibly be restricting fuel flow. I went through this same situation this spring with my 2013 DF250. Local mechanics here recommend installing an inline spin-on replaceable filter unit such as Sierra brand prior to fuel making it to the filters under the cowling.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 7:53 pm 
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MDP wrote:
There is also a very small screen filter in the fuel vapor canister. Its only about the size of a large pencil eraser so it could possibly be restricting fuel flow. I went through this same situation this spring with my 2013 DF250. Local mechanics here recommend installing an inline spin-on replaceable filter unit such as Sierra brand prior to fuel making it to the filters under the cowling.

Are you talking about VTS tank little filter? That is what was clog on my Yamaha after 1000 hours. If so, I will take that top off and r&r that filte. Very smart.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 7:54 pm 
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Brent wrote:
Any codes?

No codes.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 7:55 pm 
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Brent wrote:
what is the fuel pressure on the rail? Has the injectors been checked on a machine?

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No.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Sun Jun 11, 2017 8:52 pm 
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Marty D wrote:
MDP wrote:
There is also a very small screen filter in the fuel vapor canister. Its only about the size of a large pencil eraser so it could possibly be restricting fuel flow. I went through this same situation this spring with my 2013 DF250. Local mechanics here recommend installing an inline spin-on replaceable filter unit such as Sierra brand prior to fuel making it to the filters under the cowling.

Are you talking about VTS tank little filter? That is what was clog on my Yamaha after 1000 hours. If so, I will take that top off and r&r that filte. Very smart.


Good Idea

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1994 Parker 2320 Extended Cabin
2002 Yamaha F225 TXRA 4 stroke


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 7:22 am 
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Location: Pensacola, Fl.
Marty D wrote:
warthog5 wrote:
So here's my question........ Did you clean the tank before installing this motor?

Sounds to me like the filters are doing their job.... You just have a LOT of Crap in your tank.

Thanks for answering back. I was hoping you would read this. I don't know what to do. The Suzuki mechanic is going to do everything and replace everything on boat side but not the motor. Last year I hooked up a 6 gall tank and it still starved for gas. That told me it's the motor. I told that to the Suzuki Mech. He still replaced all gas line- gas bulb- sending unit. Why???? That piss me of.


It would me too Marty...... You proved the problem.

So time to turn loose of your Suzuki dealers name..... Lets see if we can find you another dealer to seal with.

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 7:29 am 
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MDP wrote:
There is also a very small screen filter in the fuel vapor canister. Its only about the size of a large pencil eraser so it could possibly be restricting fuel flow. I went through this same situation this spring with my 2013 DF250. Local mechanics here recommend installing an inline spin-on replaceable filter unit such as Sierra brand prior to fuel making it to the filters under the cowling.



WOW! You don't have a filter like this on your boat?

Image

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 7:43 am 
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adding m2cw

I am using a 2 micron Racor external fuel and water filter and it is changed often as I see stuff settle in the bottom of the filter bowl

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1994 Parker 2320 Extended Cabin
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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 8:15 am 
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warthog5 wrote:
MDP wrote:
There is also a very small screen filter in the fuel vapor canister. Its only about the size of a large pencil eraser so it could possibly be restricting fuel flow. I went through this same situation this spring with my 2013 DF250. Local mechanics here recommend installing an inline spin-on replaceable filter unit such as Sierra brand prior to fuel making it to the filters under the cowling.



WOW! You don't have a filter like this on your boat?

Image

Yes, I always had a 10 mic filter in the boat. I replaced them two times a year. Never was there dirt or water at bottom. This is why I don't under stand how the filters are getting dirty on motor. That is what the Suzuki Mech said. He replaced the two filter???


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 9:11 am 
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Time to change dealers. I would make sure the next dealer will hook up obd laptop during sea trials


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 9:38 am 
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Do you have a Suzuki Shop manual? Is the fuel system different from a Yamaha fuel injection system?

I am only familiar with the 2002 Yamaha F225 outboard and it does not have a lot of sensors yo check with YDS software which I havem so ornery problems are PIA to troubleshooting for me.

Our last issue was caused by the Yamaha fuel system management sender (gizmo with little paddle wheel).
It spun freely but some how was causing fuel flow issue and was resolved after replacement. We found it bypassing it. weird! This was after, tank was drained of E 10 gas ands switched to E0 gas, new fuel tank pickup tubes, remove spring and ball bearing in ASV, new fuel line to Racor, new 2 micron Racor , under cowling and F shaped fuel filters, new low pressure pump, replaced screen in high pressure pump (old ne had some buildup), cleaned VST, injectors serviced by Flagship in Punta Gorda and were fine, fuel system cleaning, spark plugs, new thermostats, and other misc items I tested the fuel rail pressure and it was spot on with the specs. It was great to have the Yamaha shop manual to study. We found no other issue other than the paddle wheel fuel management sender.

Good luck and keep posting updates. I am sure to contribute more stupid questions. LOL

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1994 Parker 2320 Extended Cabin
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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 10:45 am 
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I just looked at Suzuki 250 fuel system diagram and it is very similar to Yamaha's system.

I keep wondering if the fuel rail is losing pressure possibly to a clogged filter on the high pressure fuel pump or the VST tank is running out of gas due to float in VST or low pressure pump.

Just thinking out loud.

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 12:51 pm 
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maybe a computer scan will help and look at ECM serial number. sometimes they upgraded firmware with improvements and can be flashed in the field or replaced. maybe a factory tech bulletins can be searched which only dealers have access

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Mon Jun 12, 2017 6:50 pm 
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Location: Long Island NY
Use leeward cove in patchoge They have done a couple Suzuki for me and I have referred a few people to them and they were all happy. If your using one of the guys on eastern Long Island they have only been dealers for a couple years.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Tue Jun 13, 2017 3:29 pm 
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Lets look at this a different way. It is my opinion the engine is fine and there isn't a trashy gas problem. This sounds like a fuel delivery problem when the fuel pump is pulling the hardest. First thing to look at when it begins to starve for fuel is your fuel primer bulb. Ensure it is not collapsed any and is tight. If you have a mushy bulb or it is sucked in some there is a restriction between the bulb and your pickup in the tank. This could be caused by a kink in your vent hose and its not getting enough air or you could have a tiny piece of foil from a Stabil bottle in your tank and it is getting sucked up and restricting the fuel. When you let off the gas the suction is reduced and the engine catches up and runs fine. Another possibility is you have fuel line separation due to ethanol. The inner liner of older fuel hose will delaminate and collapse onto itself and restrict the fuel flow. Usually when this happens the bulb will also collapse some.

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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Wed Jun 14, 2017 7:50 pm 
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windknotnc wrote:
Lets look at this a different way. It is my opinion the engine is fine and there isn't a trashy gas problem. This sounds like a fuel delivery problem when the fuel pump is pulling the hardest. First thing to look at when it begins to starve for fuel is your fuel primer bulb. Ensure it is not collapsed any and is tight. If you have a mushy bulb or it is sucked in some there is a restriction between the bulb and your pickup in the tank. This could be caused by a kink in your vent hose and its not getting enough air or you could have a tiny piece of foil from a Stabil bottle in your tank and it is getting sucked up and restricting the fuel. When you let off the gas the suction is reduced and the engine catches up and runs fine. Another possibility is you have fuel line separation due to ethanol. The inner liner of older fuel hose will delaminate and collapse onto itself and restrict the fuel flow. Usually when this happens the bulb will also collapse some.

This was all done last year. All gas line replaced. Gas primer bulb. Gas tank valve. Vent checked. I had a $800 bill. Why the Suzuki mechanic did all that when I told him I hook up a 6 gall tank and problem still was there.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Wed Jun 14, 2017 7:58 pm 
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Brent wrote:
I just looked at Suzuki 250 fuel system diagram and it is very similar to Yamaha's system.

I keep wondering if the fuel rail is losing pressure possibly to a clogged filter on the high pressure fuel pump or the VST tank is running out of gas due to float in VST or low pressure pump.

Just thinking out loud.

I picked up a new primary filter today. Installed it and all good. I spoke to the Suzuki mechanic and ask why are the filters going bad so fast. He said-- the 10 mic filter filter that on the boat should be replaced every 20 hours. Wow!! That's $28 a week for me. I go on the boat every day from 7 to 2. That's 2 filter replaced every week? The gas filters on motor should be every 200 hours. All I know I replace the $20 primary filter and motor is ok. Mechanic said the gas from the gas station I'm going to is or must be dirty. My gas tank is ok and looks like new.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Wed Jun 14, 2017 8:03 pm 
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The Suzuki mechanic said be careful not to put to much stable in the gas. The gas truck that comes to our marine said they put stable in the gas already. I always added to my tank Maybe I'm causing this problem putting to much stable in the tank ? Tomorrow I will take a picture of the filter I replace. It's very dark. Looks like a two stroke oil gas mix.


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 Post subject: Re: 2015 Suzuki 250 hp starving for gas
PostPosted: Thu Jun 15, 2017 6:56 am 
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Here are some things that came to my mind.

I've never heard of gas coming [pre Stablized] How much Stabil do you add per 10gal? [I do 1oz Stabil to 10gal]

That's Crazy on changing your Racor filter every 20hrs..... I change it once a year and we average 100hrs a year.

Now..... I would agree that the fuel your buying may be dirty.....or coming from a dirty tank.

So here's your fix on that. https://www.amazon.com/Mr-Funnel-AF3CB- ... B000SOIRCG

Image


Yes it will be a lot more hands on and a PITA due to it being slower to fuel the boat.... But these things Work.

And you will be able to have show & tell with your marina if they are pumping dirty fuel.

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