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boat motor question

 
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central texan
Finger Mullet


Joined: 27 Jul 2013
Posts: 17

PostPosted: Fri May 23, 2014 12:06 pm    Post subject: boat motor question Reply with quote

Friend back home has a older 70 hrse johnson . Runs a great on muffs but will not start in water . Any ideas what would cause this ?



thanks
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spooledagain
Finger Mullet


Joined: 11 Feb 2014
Posts: 41
Location: Sandia, Tx

PostPosted: Sat May 24, 2014 7:03 am    Post subject: Reply with quote

replace the water pump and try again. You may be getting water to the heads under pressure, but that old motor may have an overheat cutoff relay that keeps you from toasting it.
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if it ain't broke, fix it 'til it is
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Lockwasher



Joined: 18 Jan 2012
Posts: 3

PostPosted: Sat May 24, 2014 9:02 am    Post subject: Motor Problem Reply with quote

Check the reeds if rusty or not closing, pressure of water on exhaust will keep it from starting when lower unit is under water.
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Hill Country, Aransas Pass, Central Texas resident.
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central texan
Finger Mullet


Joined: 27 Jul 2013
Posts: 17

PostPosted: Sat May 24, 2014 6:05 pm    Post subject: Reply with quote

Thanks guys . It was his dads boat before he passed on and it would mean alot for it to be running .
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