New 540 Motor Mount

[Punisher 67]

I have to get one more temp sensor before I do this ( this weekend ) I already have one inline for the fluid temp but need to test case temp at the end to see how much heat is still in the system to how much was drawn out by the fluid . only one sensor would be useless

[egneg]

I think the flow rate should be considered as well. A slow flow rate will not force the air out as it will trickle out the exit as soon as it gets to it. On the other hand a high flow rate probably will force the air out as it will fill the space and then exit the jacket.

[CornelP]

Could I suggest just one thing to test? Try to also do a run shaking and moving the rig. The theory about water trapped is entirely correct, but at LOW flow rates and LAMINAR flow. Once you add a bit of a swirl, the rules are different. You already induce a lot of it by entering perpendicular, not tangent and with the position of the piping BEFORE the inlet in the jacket. If you add this to the normal vibrations of the boat, I think the quantity of air trapped is minimal. Plus, thinking about it, the normal clearance between such a jacket and the motor is probably around 1mm, which will limit the air pockets anyway.
I do not have the time do do any maths or testing now, but maybe the best test would be to use a transparent cooling jacket mock up and see for the trapped air...

[CornelP]

BTW, in you fantastic setup, the air will probably go in the outlet loop. Try to use a longer piece of tubing and bring it down as in rel life use before going to the tank.
Do not be offended but what I am saying, I am a newbie with boats, but I know a thing or two about fluid flow...

[Punisher 67]

Thanks for the input Cornel

anyways I did the test , the water flow was probably equivalent to a boat moving 30 mph or more so the pressure was good . The amp draw was a little over 35.0 amp on the test bench . when my Medusa 3680/1600 comes in I would like to double the amps and try again . I expected to have more of a difference but to be honest the results were almost identical . 1st test the tubes were upright , the second test the tubes were at a 90* . here are the eagle tree 2D charts]

I also want to mention I took a infrared reading on both tests of motor case after 60 seconds and got just about the same reading , I do believe without good water pressure the results would be different

In no way am I bucking Jays origional advice on pickup placement and still agree 100% the best place for them is to the top

[Paul Pachmayer]

Hi Peter,

Man, you have got some mad skills. No doubt I'll be contacting you when I need some mounts, absolutely beautiful work.

Paul.

[mikesf]

Great piece of work Peter!!!

[Punisher 67]

Thanks for the nice comments guys

Thanks for the kudos Paul , It would be my honour to one day have a mount in your boat