How To Add A Temperature Sensor To Johnson Outboards

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September 10, 2018 at 5:56 pm #11144

Hullo.

I was researching the possibility of calculation a water temperature gauge for my 1957 Johnson 30hp and 18hp. I saw a video where they screwed a sensor into the waterjacket housing of a Johnson outboard that apparently had a "blind" threaded hole with the correct size for a sensor, but that was for a newer motor. I tin't find any information for installing this on older outboards. Is in that location a way to do information technology on these older motors? Thank you in advance.

Mike

frankr
United states of america Member - ane Year
Replies: 6141
Topics: 49

September 10, 2018 at 6:33 pm #82577

There are gauge kits that use a sensor that goes under a caput bolt. No drilling required. Enquiry that.

crosbyman
Canada Member - 2 Years
Replies: 2739
Topics: 270

September 11, 2018 at 11:58 am #82622

you could set up a wireless BBQ thermometer probe 💡 :geek:

Joining AOMCI has priviledges 🙂

September xi, 2018 at 3:58 pm #82647

H2o Temperature Judge = No.

Warning Lite for Engine Overheating = Aye

Easy installation = Yes

Where to Buy? = Check auction site.

dan-in-tn
US Fellow member - 2 Years
Replies: 961
Topics: 78

September 11, 2018 at 10:50 pm #82684

I bought a Estrus Chek (kit like pictured) off eBay. My 1957 EV Lark had one on it & I wanted a kit to see what it was near. You tin look on MarineEngine.com in the J/E Accessories Parts book section. Starting in 1972 they had one kind of sensor (even so bachelor) & past 1976 had changed to the other style which is kinda universal. Has a bracket that mounts the sensor up against the caput/block depending on application.
The trouble comes with the gauges. They are also deadening to react to save your motor in most cases. That & unless you lot drive with one eye on them all the time you don't find information technology climbing. An overheat is usually a quick thing & can be catastrophic! That is why afterwards model engines have gone to horns & speed limiting systems to get the operators attention. JMHO

Dan in TN

September 12, 2018 at 5:25 pm #82729

Thank you all for your aid. I will bank check out those options.

Mike

bobw
US Member - ane Yr
Replies: 1816
Topics: 49

September 12, 2018 at 6:41 pm #82733

Estimate I've always had a petty different view on the modern-twenty-four hour period overheat horn/limiting systems. By the fourth dimension those go off, your motor is already in overheat mode. I've ever relied on a approximate to help monitor engine temp and on the few occasions I've come close to an overheat condition I saw the gauge suddenly get-go to climb and got information technology shut down before the horn went off. I ordinarily take a glance every few minutes at both the water pressure and temp gauges which are side-by-side on my panel. I've plant the modern BRP temp gauges and sending units to be pretty accurate by verifying engine temperature with an infrared temp gun.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1959 Johnson QD-20

"Every 20 minute job is simply a broken bolt away from a 3-day projection."