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Old 16 April 2012, 18:33   #11
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Originally Posted by Locozodiac View Post
Run engine with muffs off gear, at idle or fast idle speed only, if your engine has a water strainner under cav plate, you are loosing water pressure, seal with duct tape to flush, remove afterwords.
how can i tell if i have a strainer,what am i looking for a small hole or something ?
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Old 16 April 2012, 18:43   #12
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You say "twin output" muffs, is it possible the water is heading straight through the muffs?

I usually run the engine on a fast idle to bring it up to temperature so the thermostat has opened and flushed EVERYTHING out.
yes a1an that's possible water could be going straight through. its the first time i have owned a 50hp,and this one does have a thermostat, i guessed that as soon as the engine switches on and is turning over, there should be water coming striate out the tell tale,are you saying i might have to wait till it reaches temperature
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Old 16 April 2012, 18:49   #13
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my outboard control box does give off an alarm if it gets hot and shuts down,this has happened in the past as i was using my boat on canals
Unless you got a poly bag round the lower unit,that suggests to me that you need an impeller change-it shouldn't overheat at low speeds!
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Old 16 April 2012, 18:55   #14
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Unless you got a poly bag round the lower unit,that suggests to me that you need an impeller change-it shouldn't overheat at low speeds!
It shouldn't overheat period!

A worn impeller will almost always manifest as low-moderate speed overheating first. At high speeds there's enough water forced through/past the worn blades to keep the engine from giving an overheat alarm.
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Old 16 April 2012, 19:24   #15
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i know you should always check the tell tale when your out,but honestly does everybody really check there's "come on hands up"
Every time I start the motor, and occasionally while running (and especially often after running through kelp.)

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Old 16 April 2012, 19:30   #16
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how can i tell if i have a strainer,what am i looking for a small hole or something ?
Some motors (Honda 40/50, for instance) have the regular water intakes on the side of the leg, and third on the bottom of the anti-ventilation plate (it's a rectangular screen about the size of the side pickups.) If you just put the muffs on, the water tends to go in the side intakes, and out the third pickup. A piece of duct tape over the third screen prevents that leakage. Lots of warnings about removing the tape afterwards, but I forgot several times, and never noticed the difference.

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Old 17 April 2012, 01:50   #17
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It shouldn't overheat period!

A worn impeller will almost always manifest as low-moderate speed overheating first. At high speeds there's enough water forced through/past the worn blades to keep the engine from giving an overheat alarm.
Of course it shouldn't overheat period, but as you said a worn impeller will show at low to moderate speeds 1st.
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Old 17 April 2012, 12:06   #18
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there are more experience ribbers than me , but heres my contribution.
  • while out constantly check the tell tale, if it stops.....stop
  • rinsing im not aware it makes any difference being in gear or not
  • if no tell tale with mufflers on (make sure over the intake!) quickly try removing pipe inside cowl to outlet ( ive had it where just the outlet was blocked, easily unblocked with a pin.
hi I try to look regular, after my brother blew his yamaha up! what caused it?......simple a tesco plastic bag wrapped around the leg, and blocked the intake.............simples
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Old 17 April 2012, 14:45   #19
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hi
got plenty of feed back on this one, i have plenty to check and will be abit more observant when out next, hope my impeller hasn't gone, will try flushing this weekend. will post the outcome.

thank you very much to all that replied
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Old 03 October 2013, 21:43   #20
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salt blockage

If the tell-tale s coming out there is no need to put the engineein gear as water is passing throught he water pump/impellor and everywhere else in the engine. Sound to me you have a salt blockage. I use Blue-thru which gets rid of all the salt and keeps my cooling channels clear.
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