1992 115tlrq Temp Sensor Location

[stuckonshore]

I have decided to install a seperate temp gauge,, where is a good location on these motors to install a sensor? I would like to just use a multi gauge but boat allready has seperate gauges for everything but the temp. Thanks for any advice

[boscoe99]

Top of the cylinder heads has a threaded hole with a plug in it. Remove the plug on the right side cylinder head and screw in your temperature sender.

[cpostis]

Top of the cylinder heads has a threaded hole with a plug in it. Remove the plug on the right side cylinder head and screw in your temperature sender.

Boscoe, I assume the thread on this is tapered metric pipe thread? Of course he'd have to get a sensor with the correct match.

[pstephens46]

Why not buy a yamaha sensor? Bet that would fit.

[boscoe99]

Yamaha sender for a Yamaha gauge is sized to fit the hole. Not tapered. It uses a gasket to prevent a leak. If another brand of sender is to be used then the sender will have to be adapted to fit the hole.

[cpostis]

Why not buy a yamaha sensor? Bet that would fit.

Ah, didn't know they made such an animal,. You mean # 8 ($47.68) in the diagram link. The analog gauge ($70.14) being # 1?

1992 115TJRQ Yamaha Outboard OPTIONAL PARTS GAUGES & COMPONENT PARTS 3 Diagram and Parts

Again Bosco?

[pstephens46]

Might as well buy something that works and will last. Ask Rodbolt about Faria guages.....he has a stock answer for that.

[boscoe99]

Ah, didn't know they made such an animal,. You mean # 8 ($47.68) in the diagram link. The analog gauge ($70.14) being # 1?

1992 115TJRQ Yamaha Outboard OPTIONAL PARTS GAUGES & COMPONENT PARTS 3 Diagram and Parts

Again Bosco?

About 99% right. Gauges have been updated since 1992. See this Yam document for the latest stuff.

http://yamahaoutboards.com/catalog/2016/MRP/

[scofflaw]

Added that gauge last year on an older motor. No way that bolt was coming out without damage. Ended up using the Yamaha setup but marine texed it into a pocket in the general area. Works well.

[boscoe99]

Added that gauge last year on an older motor. No way that bolt was coming out without damage. Ended up using the Yamaha setup but marine texed it into a pocket in the general area. Works well.

You got to be a man to remove that plug. Even on a brand new motor. They must use red locktite.

[fairdeal]

. No way that bolt was coming out without damage.

You got to be a man to remove that plug. Even on a brand new motor. They must use red locktite.

I had a traumatizing experience as a child;

removed a spark plug from an aluminum head and the threads came out with it.

Fifty years on,

I'm still terrified when I encounter excessive removal torque on any fastener threaded into aluminum.

If it doesn't absolutely have to come out - I'm leaving it alone....

[cpostis]

About 99% right. Gauges have been updated since 1992. See this Yam document for the latest stuff.

http://yamahaoutboards.com/catalog/2016/MRP/

Checked the latest catalog, same part #'s for both the gauge and the sending unit in the link I sent. I did see another stand alone water temperature meter Part # 6Y5-83950-00-00 that appears to be the same only black background, fluorescent red lettering others being white/black black/white. All these meters use the same sending unit.

As far as the thread, I'm 75% sure mine are tapered when I removed the from my block (thus another reason for tough removal?). I have pics, will look up the pics and be sure.

[boscoe99]

Would be the first time I have seen a tapered plug use a gasket. But I am still learning.

http://yamahamc.partsandwarranty.com...1423628&Page=1

http://www.boats.net/parts/search/Ya...201/parts.html

[stuckonshore]

Thanks for all the great info,, I am a machinist, so shoul be able to figure out if it is a Pipe fitting or a JIC type of fitting, in metric of course.. As far as removing alluminum fittings without galling, a little parrifin will help quite a bit when melted so that it runs into threads..

Thanks

[cpostis]

Would be the first time I have seen a tapered plug use a gasket. But I am still learning.

http://yamahamc.partsandwarranty.com...1423628&Page=1

2006 and Later 115TLR Yamaha Outboard CYLINDER CRANKCASE 1 Diagram and Parts

Could not find the pics. However these adapters would be used in the same block holes as the plugs. They are not tapered. I could swear mine were tapered. Could be nuts again, I'm known for that is this forum.

I have seen tapered plugs with gaskets in large commercial air conditioning compressors where thy are installed in the crankcase below the oil level.

Whatever the 1st link is in your post Boscoe, I could not get to it.