Temp gauge/sender for 90hp

[Muddy Paws]

I just replaced the stats and water pump on an '88 90hp.<br /><br />I want to add a temp gauge, but I don't know where to put the sender. Is there a Tempo (or similar) gauge/sender combo available for J/E OB's?<br /><br />Also, what is the normal range of operating temps, and how hot is too hot?<br /><br />Thanks,<br /><br />-John

 

[Barnacle_Bill]

Re: Temp gauge/sender for 90hp

Check West Marine's web site. They carry them. They may carry them here too, I've never looked. You can get a kit made for outboards.

 

[Muddy Paws]

Re: Temp gauge/sender for 90hp

OK - I'll look for the part.<br /><br />I'm still not sure where the sender would go. Is there a pipe plug in a water jacket somewhere?

 

[DHPMARINE]

Re: Temp gauge/sender for 90hp

You can do a temp gauge,and it's a good idea.But generally it tells you it's too hot (over 163 degrees ).<br />A water pressure gauge may be a better idea,as you can monitor the waterpump output,and know when to replace it.<br /><br />DHP

 

[DHPMARINE]

Re: Temp gauge/sender for 90hp

Guess that's actually waterpump input.<br /><br />DHP

 

[Muddy Paws]

Re: Temp gauge/sender for 90hp

Thanks DHPMARINE, but I'm confused now. <br /><br />Is a water temp gauge not a good way to monitor engine temps? The manual talks about thermomelt sticks and digital pyrometers to check for proper temperature.<br /><br />I've always had Mercruiser drives and American V8's (yeah, I know, car engine in a boat), so this OB is really leaving me scratching my head.<br /><br />I am being converted quickly, though. I really like this engine.<br /><br />So, does a water pressure gauge make more sense for an OB? Or, is it a waste of money since there is the tell-tale? How do you know if it is running hot, other than the alarm?

 

[Solittle]

Re: Temp gauge/sender for 90hp

An after market temp guage mounts on the head and is fastened by one of the heade bolts.

 

[Joe Reeves]

Re: Temp gauge/sender for 90hp

The temp gauge consists of a "L" bracket that is retained by one of the head bolts. The other end of the "L" bracket has a threaded hole that a brass temperture gauge screws into, the end of which should rest .010 from the cylinder head surface.<br /><br />If you cannot locate one (the two items) here at "iboats", I have a couple left in my remaining stock. Email at my address below but inquire here at "iboats" first.

 

[Muddy Paws]

Re: Temp gauge/sender for 90hp

Thanks Joe,<br /><br />That is what I needed. I already purchased the sender and I can fab the bracket easy enough. <br /><br />I am getting the impression that temp gauges are not common. I wonder if I need to bother.<br /><br />Getting the warning buzzer working is my next step.