9.5 johnson needs air?help

[dance all day]

i had this motor out yesterday,(i just bought it <br />3 weeks ago,)problem is it runs great with the<br />cover off,when the covers on and your zipping along after about 20 seconds it dies,dead in the water..wait for a few seconds it starts back up<br />and does it again.if anyone has had one of these engines they know the carbs mounted on the side<br />and the fuel line is in a tight spot(kinked) with the cover on.last night i rerouted the fuel line<br />that should help(haven"t tried it yet in water)<br />the previous owner drilled holes in the cover<br />for more air.Is there a problem with air on these engines? or is there a gasket leak or something i should check ? topless is great but not for boat motors........any ideas would be great.thx

 

[JB]

Re: 9.5 johnson needs air?help

Hi, Dave.<br /><br />One of the few problems that is common on that great li'l engine is exhaust leaks under the bonnet. Your symptoms are typical of an engine trying to run on exhaust fumes.<br /><br />Check out the gaskets on the exhaust system.<br /><br />Good luck.

 

[dance all day]

Re: 9.5 johnson needs air?help

ok thx,i'll check out the exhaust gaskets,<br />i changed the thermostat last week(it was stuck open)the lower unit is good and the cylinders<br />are 60 psi each.yea its a great little engine<br />just needed some t.l.c. i don't have a manual<br />but i'll pick one up this week. thanks again/

 

[wayne h]

Re: 9.5 johnson needs air?help

jb is right. i have about 3-4 cowling covers where people have cut out a hole right over the carb so the engines can breath haha all the engines had bad exhaust gaskets (donuts).if you are looking for a good manual (factory) look on ebay i know i keep saying this to people but you cant beat a factory service manual just for that engine.i am a proud owner of 3 of these engine and i am very happy with them.

 

[dance all day]

Re: 9.5 johnson needs air?help

well i just found out the fuel pump was on upside down lol..so that takes care of my hoses being squeezed by the cover on the left side..<br />now another thing i found was the little spring thats on the carb linkages..its there but not doing anything(linkages are too loose)does anyone <br />know exactly where this spring attaches too?<br />and are there more than just the one spring//<br />getting this motor fixed up,a little bit here<br />and there.....thanks for all your help.dave

 

[dance all day]

Re: 9.5 johnson needs air?help

where are the exhaust gaskets on the 9.5<br />(ya i know on the exhaust side)<br />i.ve rebuilt v8's before but not boat motors>><br />putting holes in the cover would work for clean air but i would like to fix it right..

 

[wayne h]

Re: 9.5 johnson needs air?help

dude chill and follow 1 post you are bouncing back and forth waisting board space.u have 4 post on the same thing