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Old 12 August 2022, 17:53   #1
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Suzuki DF 90 (2006) engine temperature

My Suzuki DF90 (2006) runs smoothly and goes up to 5k RPM without any problems, but, when idle, in neutral, after a few moments (less than 1 minute) it wil start beeping and the "temp" led will start flashing.
Switching off the engine and restarting it clears the alarm and the engine seems normal (accelerates normally and may run for long periods at more than 4k RPM without any temperature warning).
Water can be seen coming out of the "water pilot" at all times.
I have been using the engine for several years and it is the first time I have this behaviour.

Any hints about what may be causing this?


Thanks


António Manuel Carrapatoso
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Old 12 August 2022, 19:23   #2
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Has the water pump been serviced recently? Could be salt build up in the waterways.
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Old 13 August 2022, 07:09   #3
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Quote:
Originally Posted by jeffstevens763@g View Post
Has the water pump been serviced recently? Could be salt build up in the waterways.
Thanks for your reply.

It is the first time I use the boat (and engine) in 2022. It was kept out of the water since October 2021.
I normally use the boat in fresh water (lakes and rivers).

Does the water pump need any regular maintenance?
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Old 13 August 2022, 11:20   #4
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As above could be for a reason but if everything is well serviced have a google of Suzuki DF overheat class actions. Certain models are known for overheating at idle. I had a well serviced df250 which did it fairly often at idle.
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Old 13 August 2022, 11:38   #5
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[QUOTE=Valiant Knight

Does the water pump need any regular maintenance?[/QUOTE]

I think you answered the question right there!

Yes they need regular maintenance annual or bi annual impeller replacement or if you buy the genuine service kit it comes with everything to service the engine & water pump. As you change the anodes you get a good idea on the level of salt & corrosion build up. But if your mainly freshwater then that shouldnt be the issue & a simple service will remedy your issue

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Old 13 August 2022, 22:18   #6
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Sorry for the late reply 37 degrees today and the vino has been flowing as said regular maintenance is required 2 years on the 90 as I recall when I owned one. Impeller’s get memory over time so at tickover might not give enough flow increasing rpm will throw the impeller blade out to give better pressure I would start by a water pump refit kit and take it from there. Running in fresh water unless very dirty or weed/ algae growth shouldn’t be a problem, having said that I have had some issues with a small outboard river use only for a long time blocking the tell tail.OMO
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Old 14 August 2022, 06:51   #7
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Quote:
Originally Posted by jeffstevens763@g View Post
Sorry for the late reply 37 degrees today and the vino has been flowing as said regular maintenance is required 2 years on the 90 as I recall when I owned one. Impeller’s get memory over time so at tickover might not give enough flow increasing rpm will throw the impeller blade out to give better pressure I would start by a water pump refit kit and take it from there. Running in fresh water unless very dirty or weed/ algae growth shouldn’t be a problem, having said that I have had some issues with a small outboard river use only for a long time blocking the tell tail.OMO
Thanks.

I will take the engine (and the boat) to a Suzuki dealer to check the water pump and the impeller.
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