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Old 05 August 2007, 18:02   #11
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Originally Posted by Nasher View Post
Could the engine be going into Limp Home mode?

The Sender for the 2-stroke oil level on these engines is prone to failure fooling the system into thinking there is only a limited amout of oil in the tank.
The ECU then drops the max revs down to 2500.

In the past I've hard wired the plug for two of these sensors into 'Full' mode when they gave up the ghost. They are a brass tube with simple array of reed switches activated by a magnet on a float in the tank. Cutting the plug off the sensor and looping the wires together is easy to figure out if you open up the sensor to see which wire goes to the top reed switch.
Both I opened up were a mess inside after moisture had got in.

Suzuki reccomend they are changed as a service part every other year, only they are a couple of hundred quid each.

On the other hand its probably something completly different.

Nasher
This would be accompanied by an oil alarm would it not? (just for future reference as this part has never been changed on my Suzi !!!)

and no oil level lights up the middle of the multi-function guage?

Orve.
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Old 05 August 2007, 18:50   #12
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It would, but not everyone has the multipurpose gauge fitted.

Was just trying to give another possibility.

Nasher.
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Old 05 August 2007, 19:29   #13
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I would say it is dirt in your fuel tank or dirt in you carb. I had this problem before and changed the filter but did not clean the tank, it was not till I cleaned tank changed filter and cleaned carbs that all was well.

The alarm should sound if it was an oil problem and if it does not I think the engine will stop. A compression test also would be worth while.

Needing to use the throtle and quickly shift it to gear would mean a fuel or timing problem not oil.

I would say your carb has dirt in it and you have dirt in your tank which is re-infecting the system. If you can see anything in your tank it is to much.
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Old 05 August 2007, 20:13   #14
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DT85 also has a gauze filter in the oil line. If this gets gummed up and impedes the oil flow, it will put the motor into 'safe' mode, limiting the rpm to 2500/3000. Should also get a warning buzzer with this fault though.
Another common(ish) problem is the float switch which senses that water has reached the cylinder block, but this again should also sound the warning buzzer.
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Old 06 August 2007, 02:38   #15
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Thanks Nasher, Downhilldai, Bulligmore and the rest of you guys I'll follow up all this advice and keep you posted. If this dont work someone will be getting a mooring block.
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Old 09 August 2007, 16:16   #16
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The cowl on the motor does not fit 100% due to falls etc. I noticed a small amount of water might have been able to get in under the cover in a following sea or when I pulled up suddenly. Could an ill fitting cover allow the engine to suck up water? I've used an old diving trick of using a three inch strip of inner tube across the joint till I get a better fitting cover. Last three trips went without incident but my confidence in the motor is not good. I keep the aux in prime condition knowing I'll surely need it soon. Thanks again to everyone who contributed a comment.
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Old 10 August 2007, 04:23   #17
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If this dont work someone will be getting a mooring block.
I hope you manage to sort the problem and gain some confidence in the unit.

Don't turn it into a mooring block though, I'd posssibly like to take it off your hands instead if you decide to get rid of it

Cheers,

Orve
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Old 02 September 2007, 02:27   #18
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Final update

Finally sorted. It went to shop for a service and the mechanic said that a service would sort out prob 99% of time. Picked up on a Friday and with great anticipation launched on Saturday morning. I had rounded the harbour wall when it started to splutter again. SH$T. Limp home AGAIN. Look under the hood everything seems in order. I notice that the bottom plug cap is slightly loose on the threaded plug. A close look shows that cap is completely corroded inside. Up to the chandlers and 3 new plug caps. She starts up smoother than ever and is now running sweet as a nut. So thanks again to you all and sometimes its the simple things that get you back on the water. Also after paying 150 for a service I would have thought a mechanic would have spotted faulty plug cap.
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