Suzuki 1997 DT115 High idle RPMS

[rolopereira]

Hi, maybe some of you had the same problem, my Suzuki is running great, but at idle speed in neutral the motor is running at 1100 RPMs (too high) when it should be between 500 & 800. When I`m flushing the motor the RPMs goes to a steady 2000.

I have totally unscrewed the idle speed control bolt. But the RPMs doesnt go down.

Sorry for my english, I live in Panam? Central America.

Any help would be apreciated.

Thanks in advanced.

Tight lines!

 

[JUSTINTIME]

Re: Suzuki 1997 DT115 High idle RPMS

sounds like you need to re-sync the carbs

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Thanks, for your quick reply "JUSTINTIME", can you explain me a little more about "re-sync the carbs"?. Does that mean that we should try to close a little more the jets in each carb.? A technician (mango tree mechanic) have done that today with no mayor improvement.

He also noticed that a sensor was disconected, the sensor was bad, when I tried to run the engine over 3000 RPM's, RPMS drop to altmos 0 and the engine shut down, but once disconected the engine runs great. The technician told me that this sensor job was to kill the power pack if RPM's goes over 6,000. He think's this may have be the "root cause", but he's not shure. Do you know (local technician don't know) what sensor is he talking about, Part Number?

Thanks again for your help.

Best Regards,

 

[JUSTINTIME]

Re: Suzuki 1997 DT115 High idle RPMS

read the sevice manual under carbs

 

[cousinabe]

Re: Suzuki 1997 DT115 High idle RPMS

hopefully you have the suzuki service manual.
I was able to find some other helpful information here:

http://books.google.com/books?id=vg...rontcover&dq=suzuki+outboard+manual#PPA178,M1

Hope this helps a little.

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Wow, That was quick!

Thanks sir, this is a second hand motor & I dont have the service manual.

Do you think this sensor may have something to do with the problem?

The boat is located in a rather distant location with no certified technician arround. The local thecnicians are somehow "technicians made by experience" to say the least.

Thanks again for your help.

Best Regards!

 

[cousinabe]

Re: Suzuki 1997 DT115 High idle RPMS

honestly, I don't know that motor at all.

I would do a carb linkage synchronization as suggested. Are the thermostats installed on that motor to allow it to get to proper operating temp?

Does the motor idle fine in gear? at what rpm?

i would review chapter 3 of the manual i sent to diagnose sensors.
This site may help you find the appropriate name for the sensor.
http://store.brownspoint.com/dt115/1158601.asp

The carb idle air screw adjustment should be turned 1 - 1 1/2 turns out from a lightly seated position.

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Thanks cousinabe, the sensor I was talking about is the Throttle Possition Sensor (TPS).

You think this may be affecting Idle RPM's?

Regards

 

[cousinabe]

Re: Suzuki 1997 DT115 High idle RPMS

YES!
you need to ensure your TPS is adjusted correctly. This could affect the timing which would explain the rpms.

http://books.google.com/books?id=vg...ard+manual&source=gbs_search_s&cad=0#PPA63,M1

http://books.google.com/books?id=vg...uki+outboard+manual&source=gbs_search_s&cad=0

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Thanks cousinabe, I will post the result of the test.

If you're ever in Panama & want to go fishing, please send me a message, I will gladly take you fishing.

Regards,

 

[cousinabe]

Re: Suzuki 1997 DT115 High idle RPMS

I may take you up on that fishing offer!

you want to first do your carb link & synch, then set the TPS.

check your tps to make sure its good.
when setting your tps, you can slip some thin paper clips or wires into the connector so you can get readings on your meter.

Good luck and post your results.

 

[rodbolt]

Re: Suzuki 1997 DT115 High idle RPMS

can I get a fishing offer
anyway I dont have a terrible amount of experience with the DT EFI motors but they are set up almost identical to the yamaha F motors.
what has happened with yours is the ECU has seen a failure and has locked the ign timing to about 10*BTDC and most likly fixed fuel.
overrev wont affect it at idle speeds.
TPS,ECT,IAT,MAP, most any sensor failure will result in a high idle, some top speed may be reached others not.
I do a lot of work in Rio Chico Venezela so I understand third world and the technician training and parts avalibility.
but you most likly have a sensor failure or a sensor in range failure.
if you wish to do this in spanish my wife is a translator and a venezuelan native.

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Thank's guys, It was definetly thr TPS, readings were at 3v idle & went crazy at WOT.
I have found the part at the local Suzuki dealer. I have trailered the boat back to Panama City to have the sensor instaled tomorrow.

Rodbolt, sure you get a fishing offer too.

Tight lines,

 

[cousinabe]

Re: Suzuki 1997 DT115 High idle RPMS

excellent!
Hopefully it runs correct after the new part and adjustment.
Let us know.

 

[rodbolt]

Re: Suzuki 1997 DT115 High idle RPMS

here the DT was a carbed 2 stroke and the DF was an EFI 4stroke so I may have been confused.
however both used fixed pulser coils and TPS or older models used a switch to tell the ECO throttle angle for ign timing.
as the pulser coils are normally fixed at about 10* BTDC if the ECU sees a sensor failure it will default to fixed timing and idle speed is high and most times top speed cannot be reached.
most modern outboards will troubleshoot themselves if the tech is fully aware of what each sensor and subsystem does and how it affects engineoperation.

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

guys, the motor is lock, load & good to go, it run at steady 1,300 at idle with flusher (intead of 2000) it will be arround 800 in the water.

Thank you all for your help.

Tight lines!

 

[rolopereira]

Re: Suzuki 1997 DT115 High idle RPMS

Sea trial went good today, 4 snapers, 3 groupers & 1 beener + asorted trash fish.

Runing great!

Thank you guys

Tight lines

 

[rodbolt]

Re: Suzuki 1997 DT115 High idle RPMS

here was 38*F and a 20 MPH N wind.
bum