1976 jonson 15hp

riverhuntin

Cadet
Joined
Nov 2, 2009
Messages
6
why isnt the motor pumping water and does it have a pe hole? the water pump seems to be in good shape.
 

Lostfisher

Petty Officer 2nd Class
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Nov 2, 2009
Messages
147
Re: 1976 jonson 15hp

It sounds like it needs an new impeller. All outboard motors pump water...
 

bktheking

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Jul 29, 2008
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5,057
Re: 1976 jonson 15hp

Welcome to the Iboat forums. No telltale hole until 77, that's why you won't see it pumping water. There are 2 exhaust ports at the top, back of the lower unit/exhaust leg, they will spray mist from them when the pump is working.
 

riverhuntin

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Nov 2, 2009
Messages
6
Re: 1976 jonson 15hp

thanks fr the welcome. but i found out today the motor mists out water. thanks for the quick advice.
 

riverhuntin

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Nov 2, 2009
Messages
6
Re: 1976 jonson 15hp

and another prob. how do i reattach the shift rod to the foot? is there a certain way?
 

OptsyEagle

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Sep 13, 2006
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1,365
Re: 1976 jonson 15hp

There should be a couple of hex nuts and screws that connect the shift rod, right where the lower unit meets the mid-section. Only one nut/screw needed to be dissassembled to drop the lower unit and therefore only one nut/screw will most likely need to be tightened to connect it back up. The lower unit will need to be pushed up into the motor until it is about 1 inch away so that the two pieces of the shift rod come together for the screw to attach them.
 

kbait

Commander
Joined
Nov 13, 2007
Messages
2,480
Re: 1976 jonson 15hp

Put handle in reverse and get the drive shaft and water tubes aligned, then shift to forward and guide the shift shaft into the coupler. Visually check that the notch in the shaft is aligned w/hole in coupler, and add bolt.
 

riverhuntin

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Joined
Nov 2, 2009
Messages
6
Re: 1976 jonson 15hp

thanks for the edumacation lol. sorry for all the questions but where can i buy a idle control knob. i guess thats what its called
 

Rick.

Captain
Joined
Jul 30, 2006
Messages
3,740
Re: 1976 jonson 15hp

If you don't already have them you will need parts 35 through 38 to make it work. I think it is essential if you like to slow troll. The knob works as a cruise control and you can go full throttle to move to a different spot and then right back to the setting/speed you have dialed in on the idle speed knob. Great thing. Rick.
 

bktheking

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Jul 29, 2008
Messages
5,057
Re: 1976 jonson 15hp

That's if everything lines up perfectly, as the components wear this idle knob becomes useless and they break. Mine is on my motor but the motor will shut off when it idle down that low.
 

riverhuntin

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Joined
Nov 2, 2009
Messages
6
Re: 1976 jonson 15hp

ok. about the shift rod. i did wat kbait said and i bolted the foot so i could try it and i cant even move the shifting lever.
 

jay mendoza

Petty Officer 3rd Class
Joined
Aug 14, 2009
Messages
81
Re: 1976 jonson 15hp

Try turning the prop or flywheel to be sure it's not hanging up on a dog on the gears.
 

bktheking

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Jul 29, 2008
Messages
5,057
Re: 1976 jonson 15hp

Wouldn't you believe it, I just bought this same motor 1 hr ago, $75 and it runs! I smell profit!
 

riverhuntin

Cadet
Joined
Nov 2, 2009
Messages
6
Re: 1976 jonson 15hp

ok i was dumbfounded but i had a long bolt on the brass connect and it was holding me up from shifting lol.. king i got my motor for freee haha
 

bktheking

Vice Admiral
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Jul 29, 2008
Messages
5,057
Re: 1976 jonson 15hp

You did better than me, difference is I'll sell mine for $650 and you'll keep using yours!
 

bktheking

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Joined
Jul 29, 2008
Messages
5,057
Re: 1976 jonson 15hp

And I wasn't trying to brag, I just found it ironic that it's the same year and hp. But mine has a turbo so no comparison :D
 
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