Engine temp question

[Boilers2000]

I got into some shallow water in the lake today and was stirring a lot of junk up. Keeping an eye on engine temp, anything else I should look out for also? Also running a 92 4.3LX, manual says a 143 thermostat, at idle engine warms up to 170, then holds once I start idling or get on plan temp drops to 150-160 and holds...is that the normal range? Thanks in advance!

 

[nola mike]

Helm gauges notoriously inaccurate. Does it show 170 whenever you drop back to idle? It shouldn't read higher than when you're moving. When did you replace the impeller last?

 

[Rick Stephens]

My 4.3 with a 140ƒ thermostat stays nailed to the 150ƒ on my gauge - that said I never calibrated the gauge so it probably is off a little. I always suspect impeller damage when sucking up sand and rocks.

 

[nola mike]

My 4.3 with a 140ƒ thermostat stays nailed to the 150ƒ on my gauge - that said I never calibrated the gauge so it probably is off a little. I always suspect impeller damage when sucking up sand and rocks.

Mine too--152'. Unless I turn on the radio (158'). Or the blower, or the lights. Or everything (215')

 

[Scott Danforth]

my gauge with a 160 thermostat reads about 153-154

 

[Bondo]

I got into some shallow water in the lake today and was stirring a lot of junk up. Keeping an eye on engine temp, anything else I should look out for also? Also running a 92 4.3LX, manual says a 143 thermostat, at idle engine warms up to 170, then holds once I start idling or get on plan temp drops to 150-160 and holds...is that the normal range? Thanks in advance!

Ayuh,..... How long ago was the impeller changed,..??

 

[Boilers2000]

2-3 seasons ago impeller was changed, probably about 40-60 hours of run time.
Usually tops out at 170 while idling, drops 155 when under way, then will creep up once only idle. Figured it was probably the impeller. I guess regardless of run time the impeller looses it effectiveness.