sos... johnson 140 hp 89 counter rotating overheating

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fishingrey

Cadet
Joined
Jun 2, 2004
Messages
6
My counter motor is overheating. at idle water spit is normal ,when i hit the 2000 rpm mark the motor stops spitting water out of the tell whole . the motor heats up and the temp doesnt come down..even with the water coming back somewhat to the tell whole , when temp reaches 180 i shut the engine off to prevent damage to the head. i have replaced the whole water pump including bottom plate, key is in proper place.. I removed both thermostats, also idle some to see water gushing out of thermostat housings. compression 125 and above on all cylndrs. help!!
 
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Dhadley

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Feb 4, 2001
Messages
16,978
Re: sos... johnson 140 hp 89 counter rotating overheating

Does the warning horn work? If it does, does it ever sound? Or are we just going by a gauge?
 
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fishingrey

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Jun 2, 2004
Messages
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Re: sos... johnson 140 hp 89 counter rotating overheating

i compare to the standar rotating motor , and the counter is very much different. almost too hot to the touch
 
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DJ

Guest
Re: sos... johnson 140 hp 89 counter rotating overheating

The counter-rotation has nothing to do with the cooling. The couter-rotation is achieved in the foot (gearcase).<br /><br />Anyway, you have a blockage, somewhere. I would start with the heads.<br /><br />Removing the stats is not a good PERMANENT idea. OK for testing.
 
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fishingrey

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Jun 2, 2004
Messages
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Re: sos... johnson 140 hp 89 counter rotating overheating

I was trying not to remove the heads and trying to blow air through it .. what would be the best way to achieve a good air blowin procedure?? thanks a lo guys for your feedback
 
S

Solittle

Fleet Admiral
Joined
Apr 28, 2002
Messages
7,518
Re: sos... johnson 140 hp 89 counter rotating overheating

You can't examine the water passages with air. It is not a big job to pull the heads on those motors. One possibility is the deflectors which can only be checked by pulling the heads.
 
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Dhadley

Supreme Mariner
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Feb 4, 2001
Messages
16,978
Re: sos... johnson 140 hp 89 counter rotating overheating

Those loopers dont have deflectore. I would suggest to start with the heads as DJ suggests. I would second his other advise also.<br /><br />The other thing is to find out if its truly running hot or the other motor is running too cold. <br /><br />Does the hot horn work? Does it kick in?
 
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fishingrey

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Joined
Jun 2, 2004
Messages
6
Re: sos... johnson 140 hp 89 counter rotating overheating

i have not tested the hot horns.. i will start with all the hints you guys have given me!!i m pulling the boat out tomorrow!! . what really troubles me is that at idle this counter motor works perfect,, the water tell tail is normal!! is spits the water better than the twin motor.. but when pushed it stops the water out of tell tail .as if there was no impellar.. anyway i will start on this project tomorrow!!
 
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fishingrey

Cadet
Joined
Jun 2, 2004
Messages
6
Re: sos... johnson 140 hp 89 counter rotating overheating

Hi guys!! I removed the heads, they were clear. I also declogged the aspirator hose valve!! it was completely clogged!!, put everything back together, ran the motor today around 7 pm and wammm!!! it still overheats!! I m going bananas!! tomorrow I m planning to remove the water pump again for the third time!! retest the water tube and recheck the impellar key.. any other suggestion ?? thanks .
 
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