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Max Online: 36273 @ 01/23/13 02:34 PM
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#11638851 - 05/31/16 08:32 PM Extended idling (scanning) and Yamaha 250 SHO
KC_Fisher Offline
Outdoorsman

Registered: 05/20/13
Posts: 227
I have a new to me 250 SHO and have read that idling for extended periods can be a problem on 4 strokes, especially SHO motors contributing to early powerhead issues. I'm going to be scanning for a couple of days and was wondering if there's any recommended protocol for extended idling with a SHO, such as 30 minutes idling followed by 10 minutes WOT to prevent carbon build up. Or will running Ring Free and a 1 mile WOT run in between 20-30 minutes of idling be sufficient?
Don't want to blow my new motor! Thanks!

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#11639447 - 06/01/16 07:38 AM Re: Extended idling (scanning) and Yamaha 250 SHO [Re: KC_Fisher]
gary purdy Online   content
TFF Guru

Registered: 05/24/03
Posts: 11040
Loc: Littlefield Tx & Lake A. H. US...
Get extended warranty. The 2 most important things I hear: 89 octane and ring-free.
_________________________
“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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#11639474 - 06/01/16 07:47 AM Re: Extended idling (scanning) and Yamaha 250 SHO [Re: KC_Fisher]
Don G Offline
Angler

Registered: 06/14/11
Posts: 320
Loc: Comanche County, Texas
First 10 hours of break-in (no idling). Idling time after break in is not addressed in the manual although I limit mine to 30 minutes or less the vary speed from 3K to WOT for 5 to 10 minutes. Only thing Yamaha Tech advised me to use was STABIL ethanol treatment. I am curious to see what others have to say about the ring free. SHO also needs to be serviced every 50 hours.
_________________________
Don G

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#11640106 - 06/01/16 12:10 PM Re: Extended idling (scanning) and Yamaha 250 SHO [Re: KC_Fisher]
Capt Craig Offline
Extreme Angler

Registered: 08/25/09
Posts: 1251
Loc: Richland-Chambers
I use my for extended periods of idling when fishing and stopping to check an area. I have not hat a single issue in 3 years. I have been running Yamaha 4 stokes for many years and never had a single engine issue and I fished them all the same way.
_________________________
Capt. Craig Copeland
Licensed by the US Coast Guard

2013 Nautic Star 2110 Shallow Bay Boat
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#11640178 - 06/01/16 12:35 PM Re: Extended idling (scanning) and Yamaha 250 SHO [Re: KC_Fisher]
KC_Fisher Offline
Outdoorsman

Registered: 05/20/13
Posts: 227
Thanks!

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