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Old 29 November 2004, 09:43   #1
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Yamaha running Hot??

My experience with engines is seriously limited to filling the radiator water in my car so need some advice from people who actualy know what they are on about!

I have a 1996 50 hp 4 stroke Yamaha which appears to be running hot. the tell tale jet of water is strong and no alarms are sounding but the engine does seem to be very warm when run for any length of time.

Its being serviced today and they have raised this question. before i fork out a shed load of cash for them to look further, has anyone come across this before?

Thanks in advance.
Howard.
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Old 10 December 2004, 04:59   #2
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Your lack of knowledge and experience is second only to mine!! However, my engine was overheating with alarms going off etc. All the engineer found was a mishapen seal which was slightly interupting the flow of water around the thermostat housing. It would appear it doesn't take much to be wrong with the water flow to lift the temperature. Since fixing it's been OK. Hope this helps in some way, cheers Tone
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Old 10 December 2004, 13:17   #3
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Quote:
Originally Posted by Zippy
My experience with engines is seriously limited to filling the radiator water in my car so need some advice from people who actualy know what they are on about!

I have a 1996 50 hp 4 stroke Yamaha which appears to be running hot. the tell tale jet of water is strong and no alarms are sounding but the engine does seem to be very warm when run for any length of time.

Its being serviced today and they have raised this question. before i fork out a shed load of cash for them to look further, has anyone come across this before?

Thanks in advance.
Howard.

Hi Zippy

When you say "ruuning hot" exactly how hot do you mean, for example with the cover removed can you hold your hand on the powerhead whilst the engine is running, does the water comming out of the tel tale get hot to the touch and are you getting any warning alarms sounding after running for a while.

When running correct you should be able to keep your hand on the power head without discomfort but it should feel warm, the water from the tel tale should be cold to luke warm after a long run, mine runs cold even after a few hours at full throttle.
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Old 10 December 2004, 13:27   #4
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Well.....


Since originally posting this message, Fairweather have serviced her and said there is a problem with the water flow or something.

The tell tale is really strong and gets cold to luke warm when running. the pwoerhead however is hot to touch when the engine is running.

they tested to see if the alarm works (Which it does) so its obviously not getting dangerously hot at the moment. i have the new parts on order but want to use the boat a little bit. this may sound stupid but i have two reasons.....

1 I have only just got the boat and want to use it!!!

2. when the changet the oil it was filthy! really manky so when they do the work i am going to get them to change the oil again. seems logical to use the engine a bit and shake the oil arounf. then when the change the oil it should remove any remaining mank that left in there.

3. I want to play in my boat!!!!



not ideal i know but i know the problem is there so can keep a close eye on it. the alarms are not sounding and they must be designed to come on before it gets to the point of damaging the engine.


Finally, tone. your knowledge isnt that limited! thats almost exactly what the experts told me!!

Thanks
Howard
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Old 10 December 2004, 16:22   #5
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Zippy

I understand your frustration and wanting to get out on your new boat but be careful, sounds like you impellor is knackered and will need to be changed, i'd suggest getting the engine serviced and having them change the impellor at the same time, if you over heat and seize your engine your in a whole different world of pain, take the overheating as a gypsys warning and stay home until its fixed and given a clean bill of health, trust me i know i've done it and paid the price.
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Old 10 December 2004, 16:46   #6
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thats very good advise how often have we all been out especially in the summer to see many weekenders brake down and tow them back it gets to the point of dispare be safe and do not put your life at risk
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Old 10 December 2004, 17:04   #7
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Originally Posted by no fear
thats very good advise how often have we all been out especially in the summer to see many weekenders brake down and tow them back it gets to the point of dispare be safe and do not put your life at risk
Sound advice, its also worth remembering that not many others are out and about this time of year, unless your going out in company a breakdown could turn into an epic, we were out last weekend and saw absolutely no other boaters about !!!

I dont want to sound boring but consider this bit of advise giving from a well trusted and knowledgable boater ( JK ) If you go to sea with only one engine, then treat that engine like your life depends on it !!!
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Old 11 December 2004, 12:12   #8
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Safety in numbers

Quote:
Originally Posted by Bilge Rat
Sound advice, its also worth remembering that not many others are out and about this time of year, unless your going out in company a breakdown could turn into an epic, we were out last weekend and saw absolutely no other boaters about !!!

I dont want to sound boring but consider this bit of advise giving from a well trusted and knowledgable boater ( JK ) If you go to sea with only one engine, then treat that engine like your life depends on it !!!
Bilge Rat
Our boat is due to us in the next few days (fingers crossed) so we will be out to play.Will PM when going out.
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Old 11 December 2004, 17:38   #9
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Originally Posted by Paul F
Bilge Rat
Our boat is due to us in the next few days (fingers crossed) so we will be out to play.Will PM when going out.
Paul thats great news, i know you've been waiting a long time for it and hopefully it'll do everything you wanted from it, yes let me know when your going out and if we're about we'll come out and take some pics
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Old 12 December 2004, 10:06   #10
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That was sound advice from everyone there.

Unfortunatly being young and fooling i took a calculated risk and went out. (With company i might add) and all was fine.

Boats booked in for next week to have this sorted and a few other anoying things too so come christmas we should be all ready.

Thanks
Howard
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