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Jan 23rd, 2013
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Worst day ever... please helid #12374733
08/06/17 06:32 PM
08/06/17 06:32 PM
Joined: Apr 2008
Posts: 501
Fort Worth
J
Jake Blood Offline OP
Pro Angler
Jake Blood  Offline OP
Pro Angler
J

Joined: Apr 2008
Posts: 501
Fort Worth
So I finally got the wife agree to go out on the pontoon today with the kids. We hit Eagle Mountain and did a little fishing... not a bite. So.. we decided to leave early and the motor overheated on the way back to the launch. It is a Yamaha 50hp... not sure of the year, boat is an 82... I think motor is newer though. Anyway, the motor was shooting the water out just fine... so I was confused... I thought that the way a boat motor cooled itself was buy circulating water through the motor and shooting it out the back.. and as long as you saw that steady stream, you should be good. So we waited a bit, let it cool.. moved back towards the launch and it overheated again.. I was sure to check it multiple times while moving and the motor was shooting water out just fine. Oil was full, just filled it last night... Anyone got any guesses as to what it could be?

I can't afford a mechanic right now... not to mention wife will NEVER go back out with me.. not sure if I am putting that on the pro or con list yet though..

Anyway, if anyone can help me with some advice, I would be grateful.. Thank you.

Re: Worst day ever... please helid [Re: Jake Blood] #12374756
08/06/17 06:49 PM
08/06/17 06:49 PM
Joined: Dec 2004
Posts: 25,986
Weatherford
Fish Killer Offline
Big Sexy
Fish Killer  Offline
Big Sexy

Joined: Dec 2004
Posts: 25,986
Weatherford
Even if the tell tell stream is good I would start with a impeller replacement
Takes about an hour and easy to do yourself for around 50-75 bucks


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Re: Worst day ever... please helid [Re: Jake Blood] #12374757
08/06/17 06:49 PM
08/06/17 06:49 PM
Joined: Dec 2004
Posts: 25,986
Weatherford
Fish Killer Offline
Big Sexy
Fish Killer  Offline
Big Sexy

Joined: Dec 2004
Posts: 25,986
Weatherford
You tube the motor and process


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Re: Worst day ever... please helid [Re: Jake Blood] #12374807
08/06/17 07:31 PM
08/06/17 07:31 PM
Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...
gary purdy Offline
TFF Guru
gary purdy  Offline
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Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...
Clean the poppet and thermostats with Lime Away.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Worst day ever... please helid [Re: gary purdy] #12375072
08/06/17 11:24 PM
08/06/17 11:24 PM
Joined: May 2017
Posts: 125
T
TrailHand Offline
Outdoorsman
TrailHand  Offline
Outdoorsman
T

Joined: May 2017
Posts: 125
Originally Posted By: gary purdy
Clean the poppet and thermostats with Lime Away.


This!

Re: Worst day ever... please helid [Re: TrailHand] #12375081
08/06/17 11:30 PM
08/06/17 11:30 PM
Joined: Mar 2017
Posts: 262
B
Buckshotbuddy Offline
Angler
Buckshotbuddy  Offline
Angler
B

Joined: Mar 2017
Posts: 262
Originally Posted By: TrailHand
Originally Posted By: gary purdy
Clean the poppet and thermostats with Lime Away.


This!

Yep , should be a easy fix. I would still replace the impeller to make sure you're getting the most out Of it

Re: Worst day ever... please helid [Re: Jake Blood] #12375181
08/07/17 12:30 AM
08/07/17 12:30 AM
Joined: Mar 2003
Posts: 1,292
Cisco,tx
scruboak Offline
Extreme Angler
scruboak  Offline
Extreme Angler

Joined: Mar 2003
Posts: 1,292
Cisco,tx
buying used like that you also never know what previous owner did, dry start motor no muffs etc, Ive even seen them slam it in gear and run it on muffs and needless to say walked off. So all advice you have received is correct.

Re: Worst day ever... please helid [Re: Jake Blood] #12378610
08/09/17 10:29 AM
08/09/17 10:29 AM
Joined: Nov 2002
Posts: 3,741
Yantis, TX
Gamblinman Online content
TFF Team Angler
Gamblinman  Online Content
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Joined: Nov 2002
Posts: 3,741
Yantis, TX
If the thermostats are hung open due to debris or corrosion, the engine will still have the telltale, but water will run through too quick to cool the engine properly. That is the most common scenario. Its also possible that water passages in the block are partially blocked.

Pull your thermostat(s)first and clean/replace as needed.

Re: Worst day ever... please helid [Re: Gamblinman] #12378685
08/09/17 12:19 PM
08/09/17 12:19 PM
Joined: Apr 2017
Posts: 1,233
San Angelo
tmd11111 Online content
Extreme Angler
tmd11111  Online Content
Extreme Angler

Joined: Apr 2017
Posts: 1,233
San Angelo
Originally Posted By: Gamblinman
If the thermostats are hung open due to debris or corrosion, the engine will still have the telltale, but water will run through too quick to cool the engine properly. That is the most common scenario. Its also possible that water passages in the block are partially blocked.

Pull your thermostat(s)first and clean/replace as needed.


Too much water flow will not cause a motor to over heat. If anything it will prevent it from reaching the proper operating temp causing it to run rich.

Re: Worst day ever... please helid [Re: Jake Blood] #12379499
08/09/17 10:10 PM
08/09/17 10:10 PM
Joined: Feb 2006
Posts: 352
Texas
Alumacraft 14 Online content
Angler
Alumacraft 14  Online Content
Angler

Joined: Feb 2006
Posts: 352
Texas
T-stat, pull it, put it in boiling water see if it opens. If not replace.

Re: Worst day ever... please helid [Re: Alumacraft 14] #12379636
08/09/17 11:33 PM
08/09/17 11:33 PM
Joined: Sep 2003
Posts: 4,394
underwater
Bruce's Guide Service Online content
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Bruce's Guide Service  Online Content
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Joined: Sep 2003
Posts: 4,394
underwater
Originally Posted By: Alumacraft 14
T-stat, pull it, put it in boiling water see if it opens. If not replace.


^^^^^^this i bet you find it bad.
I learned a lesson from Marc Mitchel at lake fork on the thermostats.


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817-798-7246
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Re: Worst day ever... please helid [Re: Jake Blood] #12396623
08/22/17 08:44 PM
08/22/17 08:44 PM
Joined: Apr 2008
Posts: 501
Fort Worth
J
Jake Blood Offline OP
Pro Angler
Jake Blood  Offline OP
Pro Angler
J

Joined: Apr 2008
Posts: 501
Fort Worth
Thanks for all the help on this.. I have located the thermostat, but I cannot locate the pop-it valve... i is not listed on the parts diagram..

http://www.crowleymarine.com/yp/VC457073/cylinder-crankcase-50tlra-2002-50hp

Anyone have any thoughts... I can post pictures of both sides o the engine if it will help

Re: Worst day ever... please helid [Re: Jake Blood] #12396655
08/22/17 09:05 PM
08/22/17 09:05 PM
Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...
gary purdy Offline
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gary purdy  Offline
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Joined: May 2003
Posts: 11,494
Littlefield Tx & Lake A. H. US...


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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