Hey there Don or anyone else,
Got a question regarding engine temps. I am very observant when it comes to my water pressure and my engine temp and always allow for the engine to warm up and stabalize procedures before shutdown. Yesterday after motoring thru some very shallow water, i ran to my next spot, and all was fine I shut down for about 10 minutes to fish some offshore stuff, then started the engine back up and waited for temps to stabilize around 120 before getting on plane, they never came up above 81 degrees, which earlier in the day were coming up between 115-125. I noticed my wp was also lower at idle then normal as well. I figured i had some debris in one of the T-stats thus not allowing it to come up to temp. Brought the boat home and checked the T-stats and both had a few grains of sand in them holding them open less then about a 1/16th of inch. I reinstalled them and the temps returned back to normal and WP at idle was back to 2.9-3.1 psi. I was surprised at that little amount of water passage would not allow the engine to come up to temp.

I notice you have said some engines may only come up to 80-90 degrees depending on water temps and air temps. Water temps here were 39 degrees, though the engine came up to temps easily earlier in the day, and i am pretty confident it was that little bit of opening on the stats that were causing my problem.

When a known issue like this comes up out on the water what is a safe rpm range that the boat can be ran back to the ramp- asking in the event that next time it happens i wont be so close to the ramp? I cut my day short on the water cause i didnt want to run the motor with the stats not opening and closing properly. If temps are coming up to 80 degrees would it be "safe" to run the boat back to the ramp at a 3-3500 rpm range? Or can you still run it as normal? Or not run it at all?

Next question I know you have mentioned it here before, but what is the torque on the two nuts for the RH fuel rail? I bleed the system and had to back the nuts off about 3-4 turns to get the RH t-stat out and just wanted to make sure they are torqued correctly.

I will be replacing the water pump here soon as well, just to do yearly maintenance and will be calling you for some parts as well as a new fuel filter. Will probably order a few T-stats and gaskets as well just to have some on hand for the future.
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Modified by JayLaw at 5:41 PM 1/1/2012


Modified by JayLaw at 5:41 PM 1/1/2012