Idle PSI

[apdriver]

Just a quick Q. New gearcase and new impeller kit. Idle psi is 1.2 psi with good telltale. I did not replace the housing. Normal or problematic. At 4000 RPM I have 12psi. No WOT yet on the new gearcase during breakin. 250 ProXS.

[Bryanmc57]

1.2 is low, especially with a new impeller. Did you use a torque wrench when you installed the housing?

[apdriver]

1.2 is low, especially with a new impeller. Did you use a torque wrench when you installed the housing?

Yes, torqued to spec and also use the alignment bolts to make sure the plates and gasket line up properly before installing impeller and housing. The idle psi was the same on the old Torquemaster 1 I removed. This value is from a Merc monitor. Whenever I have removed the screen it has always been clean. I don’t fish any weedy lakes.

[SilverFox579]

From the FAQ topic "Water Pressure 101"...

"General" Water pressure MINIMUM requirements by engine type:

3.0/3.2L & Verado 1.5 to 3psi at idle, 15 psi at WOT

[JOE54]

would check poppet and thermostats for debri ,,,,, is temperature operating correctly ????/

[apdriver]

would check poppet and thermostats for debri ,,,,, is temperature operating correctly ????/

I’ll know more later this week but it did come up to temp pretty quick after I launched. I just splashed her for a little shakedown before I pull it up to Rainy Lake for fall Smallmouth so I didn’t do any stop and runs. Stopped just to shift some as the breakin requires and to put it through some shift cycles. I looked through my Shop manual and it says minimum idle water pressure is .8psi so not sure if there has been a change per a service bulletin or something but I am well above that. I just don’t want to chase a rabbit/problem that’s not there. Not sure about the numbers in the FAQ?

[JOE54]

report temps after shakedown please

[SilverFox579]

I looked through my Shop manual and it says minimum idle water pressure is .8psi so not sure if there has been a change per a service bulletin or something but I am well above that. I just don’t want to chase a rabbit/problem that’s not there. Not sure about the numbers in the FAQ?

Problem with the manual is, after it's printed, it never gets updated. Consumers don't get Mercury change bulletins like the dealers and is one reason why Don puts that in the FAQ so we can find the most current info.

[JOE54]

^^^ +1

[EuropeanAM]

If it's 1 - 3 psi (minimum) at idle, it's ok.

What gearcase are you running through this rigid break-in with?????

[apdriver]

If it's 1 - 3 psi (minimum) at idle, it's ok.

What gearcase are you running through this rigid break-in with?????

Thanks Don. It’s an OBR and they recommend no more than 75% for the first 5 hours. For the OEM TM1, I wanted to try something different. I haven’t had very good luck with the TM1’s I’ve had.

[EuropeanAM]

OBR or SEI?

Which Part Number?

[apdriver]

OBR. ME-G6-12B-N

[JOE54]

VERADO style good choice probly save some money too i bet

[apdriver]

VERADO style good choice probly save some money too i bet

A good friend of mine told me about these gearcases and So far I’m
very satisfied. It’s a good part not Chinese SEI stuff. That said I need to get a bunch more hours before I give a reliable review but it sure is smooth and the flo torq hub shifts like butter.

[JOE54]

yes sir its a good one ive probly sold over 200 of thier cases and not one failure even on the GEN 1 TM , good to have those kind of friends BILL these days smart man indeed

[EuropeanAM]

Good choice.