Lower half disassemble GT 150

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nebtnman

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Could someone please help and tell me how to take apart the lower half from the upper half of a Johnson gt 150 1985 model #J150stlch. I have all the bolts off and the unit drops about and inch and then hangs up. Help would be appreciated greatly.<br /><br />nebtnman
 
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R.Johnson

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Re: Lower half disassemble GT 150

You have to disconnect the shift rod at the power head.
 
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nebtnman

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Re: Lower half disassemble GT 150

Thanks for the help. What I am trying to do is replace the adapter to powerhead gasket. Is it easyer to get to it from the top or bottom? I am also going to replace the water pump, is there anything else I need to replace while I am there?
 
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R.Johnson

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Re: Lower half disassemble GT 150

There is a shift rod retaining screw that is located under the bottom carb, to remove, shift engine into reverse. To reach it, use a 3/8 wobbler with 1/4" drive on a 10" exstension This is from the port sideof the engine. Take a look at the upper water tube grommet's as long as your this far.
 
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nebtnman

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Re: Lower half disassemble GT 150

Got the lower half off but having trouble withe the exhaust houseing to come off all 12 bolts are off but there must be something I missing.<br />Is it easyer to replace the adapter gasket to the powerhead by remove the top half or the bootom half. Or would I be better off taken it to the shop><br />Thanks for all the help<br />nebtnman
 
S

seahorse5

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Jan 24, 2002
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4,698
Re: Lower half disassemble GT 150

To replace the powerhead to adapter gasket (common problem, new gasket is improved) just disconnect the shift linkage, remove the powerhead bolts and nuts, then pull the powerhead off.<br /><br />It would be best to refer to a service manual for not only the procedure, but for the required torque values.
 
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nebtnman

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Re: Lower half disassemble GT 150

Thanks for the help everything is working out as you said. I have a question aboutthe VRO2 It has been diconnected as long as I have had the boat. Can I plug the hoses and take it completely off the motor or does it serve another purpose?<br />Thanks <br />Nebtnman
 
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nebtnman

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Oct 8, 2004
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Re: Lower half disassemble GT 150

Thanks for all your help. The motor is runing fine in the back yard and will try it out on the river this afternoon. I will decarb the carbs then and let you now how things are running<br /><br />Thanks Again Nebtnman
 
N

nebtnman

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Oct 8, 2004
Messages
13
Re: Lower half disassemble GT 150

The boat ran good on the river and the fish were bitting. Thanks again for all the help.<br />Could anyone lead me in the right direction on restoring the finish on the boat.<br />Thanks again for all the help<br />Nebtnman
 
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