Suzuki DT85 Sneezing

[Kiwi]

Last summer I finally managed to adjust the idle mixture so that I get a fairly smooth idle. It doesnt look like I am going to get the time to use the boat this summer so last weekend I started it in a tank in the yard. In the 15 minutes I had it running, it sneezed maybe 5 times. I know this indicates a lean mixture, but I'm reluctant to touch the adjustments screws after having spent such a long time last summer getting it as good as it is now. Would you recommend I enrich the mixture or leave it the way it is (given it was only 5 times in 15 minutes) Is there any quick way to tell which carb might be the lean one ?<br /><br />Cheers<br />Mike

 

[Hooty]

Re: Suzuki DT85 Sneezing

Howdy Kiwi,<br />As you know, lean = bad for two strokers. You can try looking at the plugs and determine which carbie (that's Australian for carburator) is lean. Readjusting may mess up your nice,smooth idle but it will be better for the engine.<br /><br />c/6<br /><br />Hooty

 

[snappernz]

Re: Suzuki DT85 Sneezing

running the motor at an idle for 15 min will make all the plugs go black anyway so that may not help u the best way would be to take it out tin the water and give a proper run if u can

 

[rickdb1boat]

Re: Suzuki DT85 Sneezing

Hi Kiwi <br />As Hooty said, lean if bad for the Motor. Eventually you will burn a hole in the piston or at least score a cylinder running it lean. I would recommend tearing the Carbs down and giving them a rebuild or at least a good cleaning. Sounds like you may have some debris in the low speed jets that's causing your problem. All the adjusting in the world won't stop this condition if the Carb is clogged up. Remember, it only takes a speck of dirt in a jet to cause poor running conditions! I would just tear them down and clean them with Carb cleaner and blow out the passages with compressed air. That should clear up your problem! Adjusting the mixture is just a temporary bandade repair for the real problem, which as I said, could mean trouble in the long term reliability of your Motor. Good Luck,

 

[Kiwi]

Re: Suzuki DT85 Sneezing

Thanks for your replies, looks like I have a small job to do.<br /><br />Cheers<br />Mike