1986 90 HP T-stat question

[IkoN]

where are the thermostats located on a 1986 90 hp 4cyl. johnson
Shop.Evinrude.Com- diagram didn't help me

 

[iwombat]

Re: 1986 90 HP T-stat question

Follow the hoses from the bottom of the heads down to the t-stat housing.

 

[IkoN]

Re: 1986 90 HP T-stat question

What is the big plate for between the set of cylinders? I broke off a few bolts while removing that plate looking for the T-stat. now what?

Thanks,
Joe

 

[iwombat]

Re: 1986 90 HP T-stat question

That big plate is the exhaust cover (the one with ninetybrazillion fasteners on it). If you only broke off a couple (meaning two and they're not right next to each other), you can probably get by just letting sleeping dogs lie, but it'd still be best to remove them.

 

[IkoN]

Re: 1986 90 HP T-stat question

I broke 4 of them 2 are next to one another! I got the first plate off but no further.
so I should take the next plate off to grab the stud, pb blast them and hopefully extract them!
the gaskets between all the seprate plates should be replaced?

Thanks,
Joe

 

[iwombat]

Re: 1986 90 HP T-stat question

Yes you should. There are two gaskets. You'll have more luck with a torch and vice-grips than with pb-blaster. Heat 'em up good.

 

[tashasdaddy]

Re: 1986 90 HP T-stat question

you've got 4 to get out now, what difference is a couple of others going to make.