1988 90hp. E-rudeThermostat Question

[Raleigho]

Recently I sold my 1988 90hp. Tilt/Trim 20" shaft Evinrude. The buyer took it to his mechanic to replace T-stats, and the mechanic said to do it properly, he needed to remove the powerhead to access the bolts. This sounds like an awful lot of trouble to change T-stats. And big money. Anyone know the proper technique?

 

[rickdb1boat]

Re: 1988 90hp. E-rudeThermostat Question

Never heard of that one. Should be just under a housing on the back of the heads. 4 bolts and that's it to remove housing.

 

[DJ]

Re: 1988 90hp. E-rudeThermostat Question

raleigho,<br /><br />Find a different wrench.<br /><br />They are not easy to get out, but it can be done.<br /><br />For best access, just remove the bolts holding the lower cowl pan up. This allows about one more inch of clearance.

 

[rodbolt]

Re: 1988 90hp. E-rudeThermostat Question

hello<br /> the only time I ever remove the power head on those engines is for a broken bolt. I will burn off the housing and some times break it off with an air chisel but even on the bubble back ones I can still change it out with just a lower trim removal.<br /> good luck and keep posting

 

[Solittle]

Re: 1988 90hp. E-rudeThermostat Question

raleigho - I had a wrench tell me the same with my 1987 V4 SeaDrive this summer. He wanted $200.00 for the labor. Hmmmm.<br /><br />I did it myself in my driveway following the basic procedure mentioned by djohns19. The OMC manual (shop & parts) were helpful. I used a 1/4" drive socket wrench with an extra long extension and universal plus a 7/16" open end wrench to get the tstat cover off.<br /><br />The job is a bit of a pain and for that reason I would replace the tstats if the powerhead were removed for any reason whether they needed them or not.

 

[Dhadley]

Re: 1988 90hp. E-rudeThermostat Question

A 90 hp has the "flat back" exhaust plates making access to the cover extremely easy. 1.6 liter crossflows with the "bubble back" exhaust plate are a bit tougher but can be done as described.<br /><br />Seems like a second opinion might be in order for your buyer. Dont let him scam you into paying for anything you havent already agreed to.

 

[Raleigho]

Re: 1988 90hp. E-rudeThermostat Question

Thanks for your input. I will forward your responses to the new owner.