Im on my second new Quicksilver 140 degree thermostat and no luck. They were both stamped 140
My engine will run around 155-160 then cycle up to 180 with these, first one only up to 170. Running it without a thermostat it holds 110
I even tested them in a pan of boiling water with a thermometer and they both just start to crack in the 150's
Should the stat be fully open at 140? or just cracking at 140
Not sure what I should do now.
Going out on a limb here, are you using a crossover?
Yes I am running a crossover with a bypass
OK, now do you still have your old thermostat, or did you toss it? Did you put your old stat in, or was it there when you bought the boat?
Last edited by BowenCT; 05-27-2010 at 08:21 AM. Reason: typo
Did your old one have 3 - 1/8" holes drilled in it??? Mine always did when I had crossovers and stats.....(540's making 675hp) NA
Just a thought!
the "Bunnny Lounge"
Do a search, there are several good threads discussing this. Check in the technical forum.
In the pan my old one starts to crack sooner then the new ones. Quite a difference in opening from old to new with the pan tempature in the 150 range. Old is definately open more. Maybe because the spring is more worn out, not sure.
I had the motor rebuilt so I was putting a new one in. Trying to keep the temp around 140
Last year with the old one in it would run in the 150-160 temp range.
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