thermostats

[full_boat]

i bought a clymer manual for my 90 hp v4 1984 johnson. it doesn't tell me where the t-stat is located . any help!

 

[Joe Reeves]

Re: thermostats

Follow the hoses from both cylinder heads to the housing just below the exhaust baffle plate (the large rectangular plate between the heads).<br /><br />There are two thermostats and two spring loaded water bypass valve assemblies within that housing.

 

[reeldutch]

Re: thermostats

i am putting new t stats on mu 110 evi bubbleback<br />this week.<br />drilled the holes on the lower engine cover and pulled the housingbolts off.<br />i bought a new kit with brass t stats.<br />i know that there are stainles availeble, but i do not know wat will be better.<br />i'm planning to change the t-stats every year so the housingbolts wont break on me.<br /><br />reeldutch

 

[Johnson110]

Re: thermostats

Hey reeldutch, i have the same motor bubble back 110 just had the heads pulled motor get used in salt water, how did you line up holes to drill to get at the thermos, i replaced mine with stainless steel a few years ago,

 

[reeldutch]

Re: thermostats

the holes i just eyeball them, the bolds came right out. the thermostates looked pretty good to me but i will change them anyway.<br />now it seems to me that i have to get the lower enginecover loose in order to put the thermostats and the springs back in.<br />pain in the ..<br />does anybody has some tips to make it easy?<br /><br />reeldutch.

 

[reeldutch]

Re: thermostats

hey jhonny110 i live on long island to.<br />may be we can help eachother out i live in westhampton.<br />i fish moriches and shinnecock inlets and go out about two miles for fluke.<br />talk to you later<br /><br />reeldutch

 

[ledgefinder]

Re: thermostats

I remove the cover under the bottom pan, and come up from underneath with a good-fitting 6-point box wrench (SnapOn 7/16" OSH14). It's still tough on the bubblebacks. Any advice/experience with what thermostats (materials, brand names) last the longest in salt would be appreciated.

 

[DJ]

Re: thermostats

Ditto ledgefinder on his technique. It's tedious, but it can be done. Better than drilling holes, IMHO.<br /><br />Use the OEM parts. They had a vested interest in making sure they lasted.

 

[reeldutch]

Re: thermostats

ledgefinder could you explai it further i dont understand what you mean.<br />tanks reeldutch

 

[reeldutch]

Re: thermostats

i got the housing out bud i cant put it back in because of the springs. there is no space to get the housing in straight to push the springs in.

 

[reeldutch]

Re: thermostats

figgerd it out but i ripped a gasket.<br />i started the motor and the gastket that goes on first closest to the block ripped and started to leak. but the motor didnt overheat. so it was the t stats right?<br />tommorow i will try again now i know how to do it. without ripping a gasket.<br />oh should i let the gaskets dry before starting the motor?<br /><br />thanks reeldutch

 

[DJ]

Re: thermostats

reeldutch,<br /><br />Congrats! Sounds like you got it.<br /><br />Get a new gasket, also pick up a small jar of OMC gasket sealing compound-not expensive. It's messy, but worth it.

 

[Jack Shellac]

Re: thermostats

Ditto on the OEM thermostats. I get several years on my saltwater '90 V-4 with OMC parts, but only 1 with aftermarkets. OMC's are stainless steel and the others are brass. They're too much trouble to change not to go with the best. BTW, a fresh water flush after each trip will make them last much longer.

 

[reeldutch]

Re: thermostats

treu i had stainless in and i run trouble free for 3 saltwater seasons (flushed every trip with fresh H2O)<br />but i hear all kind of horror storys that after a few years the 3 bolds get stuck and might break.<br />so i choose the anual thermostat maintence.<br />because a broken bolt in that spot is gonna cost mega bucks to get out. and every 3 years i do a waterpump.<br /><br />reel dutch

 

[Solittle]

Re: thermostats

I did mine last year. I assembled everything and held them together with rubber bands. When I had the three cover bolts started I clipped the rubber bands - worked for me - don't know how the "pros" do it.

 

[reeldutch]

Re: thermostats

Thats a great idea will try it thanks<br />reeldutch