Trying to track down reason for overheat.
Right now, the raw water pump is sucking in about 1 Gal Per Min.
Does seem right? Do you think it should be more? I tested by placing intake hose in a 5 Gal Bucket marked with 1 Gal increments.
I have the Universal 5424, with the Oberdorfer N202M16 raw water pump. I think the M18 has the same pump.
I recently measured the flow, and it was 2.2 gals/min at 1000 rpm, 3.3 gals/min at 1500. (That is engine rpm. Raw water pump goes at double the crank rpm). I measure the flow by timing how long it takes to reach the brim on my 2.5 gal bucket.
If you have the Sherwood pump, it should shift a bit more.