I recently built a new SBC 350 to replace my mercruiser 260.

I used Edelbrock aluminum heads and want to put my temp sending unit in the port on the head instead of in the intake manifold where it was in the previous engine. For now I am keeping the same gauges that were in the boat from 1980.

The problem I am having is that the port on the head for the temp sensor is 3/8 npt and the old temp sensor was 1/2 npt. Can I just buy most any temp sender that will fit my head and assume that it will work properly with my gauge? There are some numbers stamped on the old temp sensor, but searching on them doesn't get me much in the way of specs. About the only thing I can find out about it is the range is 240 DS. Not sure what DS means.


Thanks for the advice,
Russ

1/2"npt female to 3/8"npt male adapter / bushing reducer

ugh, should have thought of that.....thanks.

Russ

Just trying to keep ugly stuff like wires and brass sending units off the top of the engine. Mostly just aesthetics.

Thanks,
Russ

i,m confused,old head had 1/2 npt in head.was the sensor 1/2 npt?if the answer is yes he needs a 1/2 npt hole to mount the sensor.

yup, got it and its installed.

Thanks again for the help!

Russ

well il be dambed,never seen one before.that could solve some problems.

might need to bore the center a bit to unshroud the probe end,