Engine temperature

[Jaco Engelbrecht]

I hear this guy say 104 degrees celcuis and the other 110 degrees celcuis. How do u measure a boat engine temp. I have one of those big lazer temp guns that is accurate to the dot and were very costly that I used on my trucks & cars.

Do you guys use the temp monitor with the wire that u atach to the cooling head that r permanently on the motor? (Think it gives your actual temp and highest temp). Because I cant see how I can check if my boat`s engine is running the correct temp with the temp lazer gun, because from WOT to where u take the boat out of the water on idle speed, taking off the hatch, there will be a big difference in temp.

 

[Glenn Gates]

I hear this guy say 104 degrees celcuis and the other 110 degrees celcuis. How do u measure a boat engine temp. I have one of those big lazer temp guns that is accurate to the dot and were very costly that I used on my trucks & cars. Do you guys use the temp monitor with the wire that u atach to the cooling head that r permanently on the motor? (Think it gives your actual temp and highest temp). Because I cant see how I can check if my boat`s engine is running the correct temp with the temp lazer gun, because from WOT to where u take the boat out of the water on idle speed, taking off the hatch, there will be a big difference in temp.

Good post Jaco, I never worried too much about the engine temps. in my boats but in the 1980's I worked for a company that made directional drilling tools (for oil wells). They used small stickers(like decals) on the electronics boards that recorded the highest temperatures reached. They had dots that would turn from a light to dark when the indicated temp. was reached. I don't recall who made them but there's some very bright people on this forum that might know.

Good luck, Glenn

 

[Jaco Engelbrecht]

Saw at my local hobby shop, the venom temperature monitor. Works with a wire that coils around your cooling head. Dont know how effective they r because temperature must be measured at the glow plug. Think I must maybe install that venom, run or idle the boat on the workbench, measure the temp with my temp gun at the glow plug and see what the diference is between my lazer and the venom.

 

[Michael Costanzo]

Saw at my local hobby shop, the venom temperature monitor. Works with a wire that coils around your cooling head. Dont know how effective they r because temperature must be measured at the glow plug. Think I must maybe install that venom, run or idle the boat on the workbench, measure the temp with my temp gun at the glow plug and see what the diference is between my lazer and the venom.

hi jaco, i have ran r/c for many,many years and have tried the unit you are refering to.it works fairly well. we also use a "raytech" gun to compare. we try to check the glow plug 1st and then at the base of thecoolong head. the problem with boat motor temps is that the temp of the water going through the head changes and also varies with the actual water temp itself. best thing about the venom unit, it has a "max" feature so you can make some laps and set you needle and then bring in the boat.good luck,mike.

 

[SayMikey]

Saw at my local hobby shop, the venom temperature monitor. Works with a wire that coils around your cooling head. Dont know how effective they r because temperature must be measured at the glow plug. Think I must maybe install that venom, run or idle the boat on the workbench, measure the temp with my temp gun at the glow plug and see what the diference is between my lazer and the venom.

hi jaco, i have ran r/c for many,many years and have tried the unit you are refering to.it works fairly well. we also use a "raytech" gun to compare. we try to check the glow plug 1st and then at the base of thecoolong head. the problem with boat motor temps is that the temp of the water going through the head changes and also varies with the actual water temp itself. best thing about the venom unit, it has a "max" feature so you can make some laps and set you needle and then bring in the boat.good luck,mike.

Id think if you wanted to find a benchmark temp you would want something to read max EGT. Head temp changes too fast unless you do a bonzi run towards shore head temp is irrelevant. Most will say use your hand if you can hold the head more than a few seconds its cold. Reading glow plug would benefit you much more. My 2cents

 

[bzubee]

They also have some radios now with the telemetry feature

 

[Ed.R]

Use your fingers, skin stays and sizzels a little while , TO HOT .

Ed

 

[HTV Boats]

Using a Nomadio radio with telemetry and real time temp readings has been very interesting. First you need to pick a constant area to put the sensor. Glow plug seal not a choice with a turbo plug we decided to use the area where the head meets the case not on the water jacket for hopfully a constant reading. Watching temp changes you learn they vary under load and peak at sustained wide open throttle. Unless your really lean you may not reach temp out of the water without a load. Feeling or measuring a head after a run is not very accurate as your motor cools quicker than you think. the radio has a peak readback feature that is generally much higher than you see while actually watching as heat will disperse quickly when you back off the throttle and give a false peak. I have not put a sensor on a pipe yet but that may be the best reading to have. Temp will help you tune better than anything. Most engines will not even come on pipe till you reach a temp threshold. I think there are tempurature crayons somewhere that melt at different heat ranges? Might be simplest and cheapest way go. Anyone know if and where to get them?

Mic

 

[Jaco Engelbrecht]

Were at my local hobby shop to buy the venom temp meter with actual and highest reading, but they say, venom has closed down and they cant get hold of it (They had in stock). Think I must try another hobby shop.

 

[moparbarn]

mic, the temp crayons can be found at welding supply houses & hvac stores that cater to either gas or oil fired burners

 

[Steve P]

The temp crayons seem like a cheap way to go but were on the motor would you use them and what temp crayons to get?

 

[Scott Norris]

I use the 5 finger 5 second method, except on the Novarossi's. Those lil suckers will light you up.

 

[Norm Doerr]

Stick a probe through the pressure fitting Of course you need a good themocoupler to get it done. OR go in throught the header/coupler. Once you get a benchmark of the "sweetspot" you are there.

Norm Doerr