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urgent Yamaha SHO question - prop exhaust build up
#11896113
10/24/16 01:02 AM
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Joined: May 2013
Posts: 231
KC_Fisher
OP
Outdoorsman
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OP
Outdoorsman
Joined: May 2013
Posts: 231 |
I have a 250 sho and never noticed exhaust build up in my prop. last time I checked for sure was a few weeks ago when I removed prop tocheck for fishing line, prop was clean and castle nut was clean.
Today we did a lot of idling and a lot of low speed planed runs but did open it up to WOT at the end of the day for 10 miles. After pulling boat out the inside of prop and castle nut is covered in soot. It isn't horribly filthy like an old carbed motor but it's unusual for my prop.
I just had 100 hour service 10 hours back and everything was good
Does this sound normal given how I ran it today or does it sound like something to get checked out right away? The motor ran just fine today and when wide open it hit full rpm and speed
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Re: urgent Yamaha SHO question - prop exhaust build up
[Re: KC_Fisher]
#11896124
10/24/16 01:07 AM
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Joined: May 2013
Posts: 231
KC_Fisher
OP
Outdoorsman
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OP
Outdoorsman
Joined: May 2013
Posts: 231 |
And normally I don't idle and troll a lot so if this is normal given how I drove today that would explain why it was clean in the past
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Re: urgent Yamaha SHO question - prop exhaust build up
[Re: KC_Fisher]
#11896556
10/24/16 12:27 PM
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Joined: May 2003
Posts: 11,586
gary purdy
TFF Guru
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TFF Guru
Joined: May 2003
Posts: 11,586 |
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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Re: urgent Yamaha SHO question - prop exhaust build up
[Re: KC_Fisher]
#11896596
10/24/16 01:05 PM
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Joined: Dec 2002
Posts: 3,826
Tommy Yetts
TFF Team Angler
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TFF Team Angler
Joined: Dec 2002
Posts: 3,826 |
It sounds like maybe a thermostat or two is stuck open and letting the motor run too cold. We haven't seen any SHO with a build up of carbon / soot! I would keep an eye on it.
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