'16 G23 High engine heat warning.

[Beg4wake]

Just wondering if anybody else on here has received a "High Engine Heat" warning on their new boat? I got two messages this past weekend (both at the same time) both stating engine heat was high and to shut it down. I immediately shut it down. Then I hit "ignore" on the warning. I checked some vitals and everything seemed to be fine. Also physically checked the engine and had no problem putting my hand on any part of it (wasn't too hot to touch). Checked the water strainer and it was clear as glass and water flowing through properly. And after ignoring the messages, I had no other warnings or signs of a code being thrown. Was this probably just a glitch? Thoughts?

[Hogwild]

I had a similar issue with my 15 G25, it was actually the water pump impeller that failed at about 75 hours. The engine was noticeably hot to the touch, doesn't sound like yours is though. Second time it happened was right after an oil change and the bypass valve from the freshwater intake (water hose) had accidentally been moved so the boat wasn't taking in cooling water from the lake. Might make sure yours is turned all the way in the proper direction if you have one on your boat.

[NautiqueJeff]

Has the thermostat recall been done on your boat? If not, you should really do that. Some 2016 PCM engines had bad thermostats that fail and stick closed. My 2016 had this issue. If you weren't really overheating, this probably isn't your issue, but you should have the recall completed anyway.

[jshack01]

Had a similar experience a few years ago on my 230. I just hadn't changed my impeller in a while. I'd give that a quick check for sure.

[Beg4wake]

Has the thermostat recall been done on your boat? If not, you should really do that. Some 2016 PCM engines had bad thermostats that fail and stick closed. My 2016 had this issue. If you weren't really overheating, this probably isn't your issue, but you should have the recall completed anyway.

Yeah nothing felt hot and all cooling lines were open and running water through them. I actually ran the boat about 30 more mins and got no codes or warnings. I did have 2 recalls handled during my last service but not sure what they were. I'll call my dealer and see if it was done or if my boat needs it. Thanks.

[LakePowellMan]

I had a similar issue with my 2016 G23. I took it into my dealer who made a small adjustment to the sensor. He's seen where the sensors are mounted to closely to a heat source and it causes an erroneous error message. He snipped a couple of zip ties and gave the sensor a bit of room so it wasn't pressed up against a heat source. I haven't had the issue since. This is one possibility if the engine truly wasn't feeling hot.

[Beg4wake]

I'm going to run it again this weekend and keep an eye on it. If it pops back up then I'll be making an appointment with the dealer.

[nyryan2001]

Watch your engine temps carefully and take note.

at idle, your engine should run 169-171.

after a hard run, you might see a spike 176-178, then it should come down quickly.

if you see 180-- you have a problem. You won't damage the engine till 200+.

G23 hot engine fox steps (after you verify strainer is clean, and intake under boat is clear, ensure all engine hose clamps are tight for no air leaks))

1. Change /inspect impeller.

2. Check inlet side of the tranny cooler for debris.

3. Check thermostat screen for debris.


After yesterday, I declare myself a G boat cooling expert due to yet another Dealer hackjob.

[Skidave]

Have to ask...what happened @ your dealer?

Sent from my SM-J320V using Tapatalk

[Beg4wake]

Well...ran it all weekend. Kept a close eye on all temps and checked the water flow and everything seemed fine. No more warnings. So I guess we will see. I'll still check with the dealer on the thermo recall though.