Suzuki 140hp overheat

[ciaranp]

anyone have any overheat problems with suzuki 140hp 4 stroke.
Have a look and see what you think. any suggestions? is this ok or not? engine be ok?
SERVICE DATA,,,
,Item,Data,Unit
,ENGINE SPEED,0,rpm
,IGNITION TIMING,BTDC 11,°
,MANIFOLD ABSOLUTE PRESSURE,738,mmHg
,MANIFOLD ABSOLUTE PRESSURE,98.4,kPa
,MANIFOLD ABSOLUTE PRESSURE,29.1,inHg
,BAROMETRIC PRESSURE,738,mmHg
,BAROMETRIC PRESSURE,98.4,kPa
,BAROMETRIC PRESSURE,29.1,inHg
,CYLINDER TEMPERATURE,6,°C
,CYLINDER TEMPERATURE,43,°F
,INTAKE AIR TEMPERATURE,6,°C
,INTAKE AIR TEMPERATURE,42,°F
,BATTERY VOLTAGE,11.79,V
,FUEL INJ. PULSE WIDTH,0,µs
,INJECTED FUEL AMOUNT,0,mcc
,FUEL PUMP DUTY,0,%
,IAC VALVE DUTY,0,%
,NO. OF MAP SENSOR FAILURE,0,times
,NO. OF CKP SENSOR FAILURE,0,times
,NO. OF IAC VALVE FAILURE,0,times
,NO. OF CMP SENSOR FAILURE,0,times
,NO. OF CTP SWITCH FAILURE,0,times
,NO. OF CYL. TEMP. SNSR FAILURE,0,times
,NO. OF IAT SENSOR FAILURE,0,times
,NO. OF EX. TEMP. SNSR FAILURE,0,times
,NO. OF FUEL INJECTOR FAILURE,0,times
,NO. OF OVER-REVOLUTION,0,times
,NO. OF LOW BATTERY VOLTAGE,0,times
,NO. OF LOW OIL PRESSURE,0,times
,NO. OF OVERHEAT(GRADIENT),2,times
,NO. OF OVERHEAT(TEMP.),4,times
,CAUTION SYSTEM NAME (1),Overheat temp.,
,ENGINE SPEED (1),0,rpm
,MANIFOLD ABSOLUTE PRESSURE (1),757,mmHg
,MANIFOLD ABSOLUTE PRESSURE (1),100.9,kPa
,MANIFOLD ABSOLUTE PRESSURE (1),29.83,inHg
,CYLINDER TEMPERATURE (1),130,°C
,CYLINDER TEMPERATURE (1),267,°F
,INTAKE AIR TEMPERATURE (1),30,°C
,INTAKE AIR TEMPERATURE (1),85,°F
,EX-MANI TEMPERATURE (1),125,°C
,EX-MANI TEMPERATURE (1),257,°F
,FAILURE TIME (1),146,h
,ELAPSE OF TIME (1),0,min
,CAUTION SYSTEM NAME (2),Overheat temp.,
,ENGINE SPEED (2),0,rpm
,MANIFOLD ABSOLUTE PRESSURE (2),768,mmHg
,MANIFOLD ABSOLUTE PRESSURE (2),102.4,kPa
,MANIFOLD ABSOLUTE PRESSURE (2),30.27,inHg
,CYLINDER TEMPERATURE (2),119,°C
,CYLINDER TEMPERATURE (2),247,°F
,INTAKE AIR TEMPERATURE (2),31,°C
,INTAKE AIR TEMPERATURE (2),88,°F
,EX-MANI TEMPERATURE (2),125,°C
,EX-MANI TEMPERATURE (2),257,°F
,FAILURE TIME (2),146,h
,ELAPSE OF TIME (2),0,min
,CAUTION SYSTEM NAME (3),Overheat temp.,
,ENGINE SPEED (3),0,rpm
,MANIFOLD ABSOLUTE PRESSURE (3),761,mmHg
,MANIFOLD ABSOLUTE PRESSURE (3),101.4,kPa
,MANIFOLD ABSOLUTE PRESSURE (3),29.97,inHg
,CYLINDER TEMPERATURE (3),119,°C
,CYLINDER TEMPERATURE (3),247,°F
,INTAKE AIR TEMPERATURE (3),32,°C
,INTAKE AIR TEMPERATURE (3),89,°F
,EX-MANI TEMPERATURE (3),125,°C
,EX-MANI TEMPERATURE (3),257,°F
,FAILURE TIME (3),146,h
,ELAPSE OF TIME (3),0,min

[Cypman]

Although originally a Cork man myself I am unable to fully understand your downloaded information!!! All I can advise is based on my own experience of owning a Suzuki DF140 and that is that the engine is designed to run at high operating temperatures. As a consequence I experienced 2 high temp audio alarms whilst flushing the engine, these were caused by low water pressure on one occasion and poorly fitting muffs on the other. No damage done!!
Your issue may be totally unrelated of course.

[ciaranp]

thanks for that. Will check it out

[OceanEco]

Check the impeller. I had a motor right out of the box that overheated when ever I went over 4500 rpms. Checked the impeller and it looked perfect so we changed the thermostat and the problems continued so changed the impeller and everything was fine. The suzuki 4strokes seem prone to over heats more than other outboards that I have run(Merc opti and yamaha 4stroke).

[ciaranp]

thanks for that info.maybe it just gave the heat warning when being flushed

[9D280]

I'll echo cypman with the download info, but if i'm reading it right "EX-MANI TEMPERATURE 125C seems very low. Assuming I'm translating that right I would expect an exhaust manifold temp (or at least the exhaust gas inside it) to be in the region of 800-900C.

I guess if the "brain" detects low water pressure as OceanEco says it could be programmed to squeal the overheat alarm as an advanced warning so you don't actually cook it....... Low pressure when you're running full chat & a plastic bag gets wrapped round your intake will be more preventative than waiting for a temp sensor to trip.

[Erin]

Hmmm, very interesting. There seems to be a trait here. I had three overheat alarms on my DF90, which we all know is a very similar block and design to the 140. On the first two occasions there was a momentary drop in water pressure, the alarm went off and I stopped the engine. I instantly restarted and it was fine for the next few trips. On the third time a restart didn't help and there was definitely very little water coming out the telltale if I revved above 1200rpm. The impellor was replaced after the first overheat and checked after the 2nd and 3rd times and no sign of any prob. Strangest thing was after the third overheat as the next day all was fine again.

I see from your printout that the engine was at 0 rpm when the readings were taken. Is this relevant. I know the Suzzys don't have an electronic water pressure sensor and rely purely on heat rise over time in the sensors for a 'gradient' temp alarm, or an out-of-range temp for the other overheat scenario.

PM me if you want more info on my experiences

[ciaranp]

sent you pm

[ciaranp]

anymore of you out there with suggestions.is this engine ok?

[Chris]

Ciaran,

How did you get that engine diagnostic printout?

[ciaranp]

a main dealer did it for me and sent it on.I'm buying rib with this engine and have never seen one of these printouts before and would like suggestions from people who are use to seeing them

[Chris]

Ciaran,

If I am right in thinking you are saying that only from this printout do you know that the engine has had an overheat? You have not acutally had an overheat occur with you as you have not in fact bought the boat yet??

If you were to examine most engine printouts you would probably find that they have at some point or another suffered from an overheat, normally due to a plastic bag round the water intake. I know mine has.

If I were you would not get too caught up in these printouts. If the main dealer ran this he would also have picked up on any problem areas.

[ciaranp]

Haven't bought the boat yet just about to.
Got the seller to get main dealer to run the diagnostics.Never seen one before so thats why i posted it for suggestions.possibly just a flushing issue or reduced water pressure. The rest of this printout looks good as low hours in the high revs and more time in the mid to low revs.

,0-1000 RPM,5184,min
,1000-2000 RPM,1822,min
,2000-3000 RPM,352,min
,3000-4000 RPM,3164,min
,4000-5000 RPM,1762,min
,5000-6000 RPM,514,min
,ABOVE 6000 RPM,0,min
,ELAPSE TIME FROM REMINDER CANCEL,32,h
,NO. OF OIL CHANGE REMINDER,3,times
,COMPENSATION FACTOR (ZONE 1),1,
,COMPENSATION FACTOR (ZONE 2),1,
,COMPENSATION FACTOR (ZONE 3),1,
,TIME OF LAST O2 FEEDBACK,0,h
,EMERGENCY STOP SWITCH,ON,
,CTP SWITCH,ON,