91/2 Johnson fix

[geoff69]

Hello everyone,or anyone. I need help here.
I am the proud owner of a 65 Johnson 91/2 seahorse.I have been having trouble with it regarding power under load.In other words I can start and run it but it is only a shadow of it's former self.I took it to a repair guy who had it for 3 months and charged me $60,00 and said he couldn't fix it and he thought that the bottom seal may be shot.Fine no problem there ,I can fix that myself,except that the manual blithely says(remove power head) what it doesn't say is how.I am sure that eventually I could remove the power head but It would be a whole lot easier if I knew the correct sequence to do this,bearing in mind it looks like the cowling and casing have to be removed.If any kind soul out there knows the correct way to go about it he would have my undying gratitude.
Thanks in advance .
Geoff69

 

[iwombat]

Re: 91/2 Johnson fix

Starboard side of lower cowl must be removed. It's a lengthy procedure, but really not all that hard. My OEM manual has the step-by-step procedure on this.

Here's a picture of what it needs to look like just prior to powerhead and inner exhaust housing removal.

 

[tashasdaddy]

Re: 91/2 Johnson fix

check your compression and spark first. does it run good with the cowl off, and falls on it's face, with the cowl on.

 

[iwombat]

Re: 91/2 Johnson fix

What tashasd said. There's a whole slew of things to check for before popping that powerhead off.

 

[wbeaton]

Re: 91/2 Johnson fix

Have you looked at the coils?

 

[geoff69]

Re: 91/2 Johnson fix

Thanks Friends.No I haven't tried anything else yet,I was just going by what the repair guy?? told me.I will check every thing else before i start tearing it down and holler if i get into trouble. Thanks again.
Geoff69

 

[iwombat]

Re: 91/2 Johnson fix

definitely check the cowl on vs. cowl off situation. That's a common problem on those 9.5s and is often caused by a shift-shaft seal failing.