what do you mean install 3rd mixing needle for cooling

[mike burt]

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

 

[Rigged]

3rd channel needle for fuel mixture... if its getting to hot from lean being, you richen it up while its running instead of having to bring the boat in to do it manually.

 

[Joe Warren]

B)

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

He is telling you to install a adjustable water control valve......... Small engine need very little to pratically no water to cool the engine. if you have a small adjustable needle installed into the water line you can fine tune the water operation temp. However it does not need to be a third channel mixture control..... Just a small adjustable fuel needle (os type) will do the trick. The colder you run the engine to more you will have to lean it down to make heat cause the water has the ability to remove more heat than the engine can make........ B) This is a Nice problem to have if you are running a 613 CID Big Block Chevy w 13:1 Pistons 2 x 4`s & a little NITROUS.... The entire lake becomes your Radiator.

 

[Blackout]

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

Did he tell you to run an air cooled head instead of water cooled? If so, then what Rigged said.

Small engines seem to do better by cooling with more fuel. I run little to no water in my Novarossi 5-port and that has a water cooled head with no fins.

 

[mike burt]

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

Did he tell you to run an air cooled head instead of water cooled? If so, then what Rigged said.

Small engines seem to do better by cooling with more fuel. I run little to no water in my Novarossi 5-port and that has a water cooled head with no fins.

Not running water cooled head cut off all but 2 fins but to install servo to run 3rd channel mixture needle seems like a big hassle to me?do i really need to worry about that

 

[Rigged]

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

Did he tell you to run an air cooled head instead of water cooled? If so, then what Rigged said.

Small engines seem to do better by cooling with more fuel. I run little to no water in my Novarossi 5-port and that has a water cooled head with no fins.

Not running water cooled head cut off all but 2 fins but to install servo to run 3rd channel mixture needle seems like a big hassle to me?do i really need to worry about that

You dont have to... you just have to always bring the boat in to make a small needle adjustment.

 

[julianconde]

I run no water on my htb tunnel with a cmb 21rs motor and it runs fine. That's just me I would just bring it in and make small adjustments run a 3rd channel on your boat for fuel mixture Make the adjustments necesary then use the 3rd ch from there and you will be good. When I did run water cooling I took a ziptie and restrict the water that's all.

Julian

 

[Blackout]

I have os 12tz another guy told me to run no head and install 3rd needle for mixing to control temp.I dont understand??

Did he tell you to run an air cooled head instead of water cooled? If so, then what Rigged said.

Small engines seem to do better by cooling with more fuel. I run little to no water in my Novarossi 5-port and that has a water cooled head with no fins.

Not running water cooled head cut off all but 2 fins but to install servo to run 3rd channel mixture needle seems like a big hassle to me?do i really need to worry about that

No, you don't need a 3rd channel needle. Just start out rich and slowly lean making sure the head temps don't go way high. 2 cooling fins sounds like what most run on aircooled engines.

 

[Ron Olson]

I think that I know what's he's typing about. Before his passing, Ric Carpenter had been working on an electronic thermostat for nitro engines to help control the amount of water flow going through the head.

Yes, you could use a remote valve to control that amount of flow but would it work fast enough?