over heating 1998 dt140

[chuckH]

I have a 1998 DT140 purchased new by me. Until recently motor ran great but it has started giving me a temp warning and shuts down to under 3000 rpm. I have had the impeller changed out and a new thermostat put in. I have talked with tne repair tech and he says the only thing that he can think of next is to replace the temp sensor. After reading the other questions on different models I think some refer to it as a flow sensor. And this is the crux of the matter, which is it a temp or flow sensor. It is not touched by water at all. It sits in a small pocket surronded by metal. I just want to have the right info when talking to tech.

 

[fish4970]

Re: over heating 1998 dt140

chuck you may want to look at some of my posts<br />or some from jimd <br />i am begining to think that suzuki needs to <br />stick with motor cycles<br />the only problems i see with suzuki is that many of us are getting overheat problems that we keep throwing money at and not getting any results<br />good luck

 

[bossee]

Re: over heating 1998 dt140

Chuck,<br /><br />I had the exact same problem with my old (and by now sold - I own a Yamaha F115, 2003 now) Suzuki DT65 (1991).<br />- I replace the impeller with a new (did not help).<br />- I replaced the thermostat with a new (did not help) - I tested the new thermostat in hot water and it opened at temp marked on the thermostat (at about 50 Celsius in my case).<br />- I replace the waterflow sensor (it close when water flow hit it, and opens if no water flow and therfore give overheat alarm then).<br />At first I still had the same problem. Later we found out the new waterflow sensor actually was defect... (more about the below).<br />- Had the coling channels flushed/cleaned by a Suzuki service center (made no diffrence since the cause was the waterflow sensor, but we did not know that at this stage).<br /><br />So, the Suzuki service center said to me it must be the waterflow sensor that was defect despite it was new (You can measure with an Ohm meter I believe to check if it is working, it is described in Seloc or Clymer manuals how it is done if I remember right). Anyway, the Suzuki Service center ordered a new water flow sensor and belive it - the engine runs without overheat alarms and rev limit jumping in. So that was the cause in my case, maybe in your case also?<br /><br />One thing about waterflow/temp sensors:<br />For my Suzuki DT65 there was two models of it, one that is actually a water flow sensor, the other (on newer models) I belive was a tempsensor, both doing the same jobb - to trigger the overheat alarm (and in the end rev limit).<br /><br />/Bo