Suzuki DT11502 with problems

[Remco]

Hello,

I am Remco from Holland. Before I start, excuus me for my English.

I have an Suzuki DT 115 '88 with some problems. I looked for awners on this on this great forum, but it did not work. So I thought I start my own threat.

Here is my problem :

Yesterday I took my boot out on the river and the motor did not give any power. It idle's in forward and reverse and i can give a little bit of gas but it won't get out of the water. Someonde else pussed the bol ( that gets from the tank ) to give gas to the carbs, but that made no difference.

What i did before i got to the river :

Changed the sparkplugs, cleaned the carbs good, checkes the fuelpump, the gaspositoin sensor is off ( it wont idle with the sensor on ) changed the fuel hoses and filter.

If the engine runs it stotters, like the ignition is not working good.

Can anyone help me?

Thank you!

Greats Remco

 

[clamdigger1]

Re: Suzuki DT11502 with problems

I'm sure someone out there who has a true understanding of outboard mechanics can give you the correct answer. I can only tell you what happened to me which seems kind of similar to your problem. I went through the entire check list: carb rebuild, spark plugs, compression test, fuel, fuel connections, oil pump, etc. My problem was my power pack. I have an 86 115
Maybe this will help, good luck

 

[Remco]

Re: Suzuki DT11502 with problems

Okay, thank you. Is that an expensive part?

 

[James R]

Re: Suzuki DT11502 with problems

You should do a compression check first. Compressions should be even and generally 90 PSI or better. If you have one bad cylinder or more then dont go any further. The motor will need rebuilding. If all is well with the cylinders and you are satisfied that a good job has been done cleaning the carbs then you may look to the ignition system. You really need to get a manual on the motor to move forward on this.
If it comes down to the ignition pack, motors both 115 and 140 from '86 thru '94 used the same unit. Go to Ebay and try your luck there.

 

[Remco]

Re: Suzuki DT11502 with problems

Thank you for your reply. I have the manueel on CD. What should I check first, too be sure it is the power pack?

 

[Remco]

Re: Suzuki DT11502 with problems

My plugs for that cylinder were nearly new looking. Ceramic was as white as if I'd just pulled them out of a new box. Yet they were gas/oil wet. I eventually bought new coils for mine and it greatly solved my problem.


The text above is exactly what my engine does too. But can anyone tell what a Coil is? My english is not that well......

Thanks!


Greets,


Remco

 

[James R]

Re: Suzuki DT11502 with problems

The first thing to check with any motor are the compressions. If the compressions are not good then the rest is a waste of time and money.
Do the test or have it done then we have a place to begin.

 

[Remco]

Re: Suzuki DT11502 with problems

James, compression on all cilinders ik ok.

 

[James R]

Re: Suzuki DT11502 with problems

Next check the sparks. Simple test. A length of bare copper solid core wire. Fasten one end under a bolt head on the block. Could use a thermostat housing bolt. Be very carefull. If the bolt is reluctant to unscrew try another bolt. These bolts freeze up and can shear off easily. Form four loops in the wire to accept the threads of the plugs. Remove the plugs and connect to the plug wires. Slip the threaded ends of the plugs into the loops in the copper wire making the connections as tight as possible. You will need to watch the sparks at the plugs so get your buddy to crank the engine at the remote.
The spark on these motors is characteristically strong but not as blue as on many motors.
If you have good sparks and the plugs are of the correct type and reasonably new we may consider that you still have a fuel problem.

 

[Remco]

Re: Suzuki DT11502 with problems

James, checked the sparkplug's. Put some new one's in. The right typ. Did your procedure and all worked good. De sparkplug's are still all a little wed/grease.

The engine keap's stottering and does not pick up. It look likes it stifle?s. `smoren in dutch ` Dont know the correct word for that....

 

[James R]

Re: Suzuki DT11502 with problems

Look to the adjustment of the Pilot air Needle in the front of each carb'
Gently screw each needle in untill it seats then back it out 1.5 turns.
Start the motor and allow it to warm up. Make a small adjustment to the top carb' needle in or out and listen for an improvement in RPMs. Adjust a little and wait for the motor to compensate. Do this for all four carb's then go back to the first carb' and repeat the process untill satisfied you have the best condition. Now try the pick up. If the carbs' are clean, the floats are set to the correct height and the oiling system is not over oiling you should be in good shape.

 

[Remco]

Re: Suzuki DT11502 with problems

Thank you james, ik will try that tonight. If I understand you correctly the screw on top of the carb is adjustelbe? That's an eye opener. I thought that the screw just needs too be compleet thyght. If I turn it out it is sitting loose....? Now my english is turning really bad, I hoop you understand....

 

[James R]

Re: Suzuki DT11502 with problems

You do not understand correctly. You say you have the manual.
Remove the plastic cover from the front of the carbs. Then you will see the Pilot air adjustment screws one for each carb.

 

[Remco]

Re: Suzuki DT11502 with problems

I understand. But do u mean the same, by the top needle en the needle in the front of the carbs?

 

[Remco]

Re: Suzuki DT11502 with problems

I understand you now. Did some research It make's no difference. The engine keaps stottering and sparkplugs still keap wed/grease.

 

[James R]

Re: Suzuki DT11502 with problems

Before spending more time and money I would have the carbs cleaned properly and check the float level settings. If the float heights are not set correctly then the motor will be in a constant fuel flooded condition.

 

[Remco]

Re: Suzuki DT11502 with problems

There is no counting coil on the top of my engine. Can that cause the problems?

 

[James R]

Re: Suzuki DT11502 with problems

You say that this is a 1988 model. Yes there should be a gear counting coil. What is the full serial number so that I may check the year. Earlier models did not have the coil.