Slightly over the normal temp

[dompie99]

Hi everyone,

I had the ride of my life today as this babe of mine exceeded the 90 mph milemarker.....on GPS.

Now one thing. Previous to the breakage of the mid section, I believe that the temperature gauge was holding itself at around the middle of it«,s reading.
Now I've replaced the mid with a 2000 3.0L 200HP mid and as the temp was not steady AND slowly rising as I was cruising at 3500 rpm, I been told to re-install the OLD tuner on the NEW CAN and so I did.

The temp is not rising as high as before But it remains a needle above the middle at 3500 RPM. (should have taken a pic grrrr ).

Now when I verified on the hose the temp, at idle, the bloc remains on all cyl at around 135*, the bottom (2) heads are at 140* and the top one (both) at 156*.

Now If I compare this reading with the temp gauge (no numbers on it ) it's consistent.

Only once today, when I was pushing it, it rose to 3/4 of the temp gauge.

Spark plugs are cafe au lait color but a little darker than coffee with milk on all 6 and compresison is around 140 psi on all 6.

Changins the tunner made it stop climbing up in temp but to My opinion, it's holding itself quite high.

What do you think..


PS: before reducing the jetting, they were all .079'' and the plugs were dark and wet. ( motor has about 20 hrs since rebuild.

[dompie99]

TTT bump

[eli]

143 is where thermostats open on most fishing engines ,so if your hotter than that find out or you will shorten life of the motor
we were out this weekend and my alarm went off at 150 so we took off and it cooled down I,m running 135/140 head temp
lake water 85 ish ,I believe something got stuck in pickup on cle has happened before with cloudy water

[stv92]

Might be only the water pump?
have you checked your water pump?

[dompie99]

Thanks for the replies,

I did check the water pump's impeller, immaculate !! as nice as the housing.

Grommet between the pump and the tune is okay too. cleaned the upper gromet when I replaced the exhaust tuner '' checked ''.

May I consider the fact that the engine has around 140 psi compression ?? could that be a factor to increase the operating temp. ??

The lower pick-up is a LAND-and-SEA ?? with dual water tubes. I increased the size of the water intake at the LWP holes.

When the jetting were '' FAT '' it was not so '' WARM ''

This is where the temp gauge is staying when I ride no matter what speed. It goes slightly below middle when I coast at around 3000 or 2700 RPM's

Really not feeling safe to run it this hot

PS: there is NO indications as to what temp range is shown on these gauges ( Teleflex Seastar Pro Lido )

325847

[dompie99]

I have to say that I received a prompt answer from Veethree instruments about the indications on their Seastar Pro Ilde gauges and here is a paste of the answer.

325927
From left to right
C – 120 deg F
Next mark – 140 def F
Mid – 160 deg F
Next mark – 180 deg F
H – 220 deg F

These temperatures are an approximation. I was unable to open the link you said where the picture was. ( S&F link )

[Pmj341]

My 2.5 280 runs 160 at 7200 rpm.
Its 150 cranking compression, EFI.
:cheers:

[dompie99]

I will remove the lower unit this week-end and make sure that the seal on top of the water pump is intact AND feed the motor straight with a hose on the inner tube.

If it remains at 165*, I will state that this it's operating temp, otherwise, I will re-evaluate the water pump and case.