Suzuki DF 2.5 stalling issue

[Jcorstorphine]

I know this has been on before as per link below but has anyone got an update on the stalling problem.

http://www.ybw.com/forums/showthread.php?314023-Suzuki-DF-2-5-running-issues/page3

Has anyone tried carb cleaner or injector cleaner to remove any gum.

It seems as if it is a well documented problem and Suzuki can supply a jet kits for about £40.

Bl**dy cheek, if you ask me, they put an engine on the market designed to run lean so it can pass the emission test and then flog you a kit to make it run correctly for £40 + labour.

Has anyone challenged Suzuki over this.

Bit like my **** Peugeot 508 with its fancy computer controlled gearbox which gave very good MPG and very low CO2 emission but never was in the right gear and was dangerous when trying to pull away so Peugeot carried out a software upgrade which was a big improvement but my MPG dropped for 55 to 45 overnight. Like the Suzuki, I bet it does not pass its emission levels any more.

 

[dartmoor]

try this :

http://m.youtube.com/watch?v=o2xpV9CJCNc

 

[kacecar]

My Suzuki DF2.5 suffered from the same problem. However, I'm only using the past tense in that sentence because it seemed fixed when I picked it up from the dealership in January. Since then I've not had an opportunity to put it through a field test so disappointment remains a possibility - however, the signs are good and I live in hope.

I was feeling very disappointed with the unit when, after some googling, I wrote to Suzuki GB to find out if or where I could find the replacement carb-jets referred to in the various threads on American web forums discussing the stalling issue. Suzuki GB replied promptly, saying that from what I had described they did not believe that there was a problem with the jets. Their Technical Department suspected the carb was partially clogged and therefore needed replacing. They pointed out that the motor was still under warranty (a 5 year warranty came with the engine) and suggested I take it to an Authorised Dealership. They also pointed out that info on the American forums was not substantiated and that, anyway, the USA spec engine has a different carb, fuel system and ignition system. Clearly, Suzuki GB could not recommend the use of the spare parts discussed on those forums.

I took it to a Dealership and there the engineer was able to replicate the all the various "symptoms" I had reported. He next tested the fuel in the tank / carb for the existence of water. It was just about OK, which was good because if it had been found contaminated any warranty claim would most probably have been rejected. He then checked all the units for other signs of blockage failure but could find none. Accordingly the dealership changed the carb under warranty. (At the same time I got the dealership to do a full service - it was due anyway.) When I picked the motor up it appeared to be running strongly and without an apparent flat-spot or any sign of stalling.

So . . . fingers crossed.

 

[dartmoor]

I have noticed that all these new small four stroke outboards have a tendency to at the very least hesitate when throttled up from idle - certainly seen the mariner 2.5hp do exactly the same, and I noticed it when I used a Yamaha 2.5 some years ago. I am sure it is down to what they do to reduce emissions. And sure enough, they are all very economical.

Its so ironic that tiny engined outboards are so over regulated - when you can buy any petrol garden tool, including a two stroke, with far less rigour. I'd be very annoyed if a chain saw hesitated every time you wanted throttle from idle.....

 

[Tam Lin]

Wrote to Suzuki about this the other day. Am waiting for their reply.

 

[Jcorstorphine]

Tried Suzuki Uk but did not get any satisfaction

My Suzuki DF2.5 suffered from the same problem. However, I'm only using the past tense in that sentence because it seemed fixed when I picked it up from the dealership in January. Since then I've not had an opportunity to put it through a field test so disappointment remains a possibility - however, the signs are good and I live in hope.

I was feeling very disappointed with the unit when, after some googling, I wrote to Suzuki GB to find out if or where I could find the replacement carb-jets referred to in the various threads on American web forums discussing the stalling issue. Suzuki GB replied promptly, saying that from what I had described they did not believe that there was a problem with the jets. Their Technical Department suspected the carb was partially clogged and therefore needed replacing. They pointed out that the motor was still under warranty (a 5 year warranty came with the engine) and suggested I take it to an Authorised Dealership. They also pointed out that info on the American forums was not substantiated and that, anyway, the USA spec engine has a different carb, fuel system and ignition system. Clearly, Suzuki GB could not recommend the use of the spare parts discussed on those forums.

I took it to a Dealership and there the engineer was able to replicate the all the various "symptoms" I had reported. He next tested the fuel in the tank / carb for the existence of water. It was just about OK, which was good because if it had been found contaminated any warranty claim would most probably have been rejected. He then checked all the units for other signs of blockage failure but could find none. Accordingly the dealership changed the carb under warranty. (At the same time I got the dealership to do a full service - it was due anyway.) When I picked the motor up it appeared to be running strongly and without an apparent flat-spot or any sign of stalling.

So . . . fingers crossed.

Thanks for the reply. I phoned Suzuki GB which was a waste of time as all I got was "take it to your dealer" so I think I will write a strong letter as my dealer is talking about changing the jets (to a larger size perhaps)

Hope yours work ok.

 

[Jcorstorphine]

Wrote to Suzuki about this the other day. Am waiting for their reply.

I am just I the process of writing to Suzuki as tried phoning which was a wade of time, according to the lady who answered the call, they do not have a technical department

Let us know how you get on

Regards

jc

 

[dartmoor]

The trouble is, I think this will be a design issue, not a fault. The Mercury/Mariner 2.5 has exactly the same issue. It can be managed by opening the throttle very very slowly allowing the engine to respond very gradually to the increase in fuel. Once the revs have reached a certain level, it will then respond more happily. These engines just tend to stall from idle when you throttle up even a tad too quickly. I think its much worse too when the engine is new.

Not very helpful I know - my way of coping was to sell my 4 stroke and go back to 2 stroke! Never looked back

 

[kacecar]

It can be managed by opening the throttle very very slowly allowing the engine to respond very gradually to the increase in fuel.

I'm afraid the problems with the "flat-spot", cutting out and stalling that I (and, seemingly, quite a few others) had been having are most definitely NOT manageable "by opening the throttle very very slowly". Neither is it a problem that eases as the engine gets "run in" - quite the reverse. However, I agree it is possibly a design issue, as I never had these problems with my previous small 4-stroke outboard.

Those of you that have tried writing or telephoning Suzuki GB without success might like to try their web-site. That was how I contacted them - their response was prompt, courteous, informative and useful. I did end up spending money with a dealer though.

 

[Ripster]

I bought a DF2.5 last year and ran it all season. Its the latest model with the updated prop nut. It runs and responds fine at all throttle points and does not stall - really it doesn't!! The only time it fluffs a bit it is when cold if the throttle is snapped open and you try to pull away. But, even then it coughs and picks up. Have they updated the carbs or jets or something?

 

[kacecar]

I bought a DF2.5 last year and ran it all season. . . . Have they updated the carbs or jets or something?

Mine was purchased in mid 2011. Given the apparent level of problems with the engine and the discussions on various boaty forums I wouldn't be at all surprised if the carb spec has somehow been refined such that your 2013 model is much improved over my 2011 version. Hopefully my nice new carb is now the same as yours.