Main board

[msearcher]

Can a 422 board be used in a 441 and the reverse without any setting adjustments?

[hawkins111]

No you can not use a 422 board on a 441. The fuel pump control is on the board and the two heaters are different.

Tom

[msearcher]

No you can not use a 422 board on a 441. The fuel pump control is on the board and the two heaters are different.

Tom

Thank you, that is what I thought, noticed someone had a board that could be used in either and I did not believe that was correct.

[Bryand]

Thank you, that is what I thought, noticed someone had a board that could be used in either and I did not believe that was correct.

I have used the 422 in a 441 and worked fine. You can also use the 441 in the 422 as long as you are using a external tank.

[hawkins111]

Fuel flows from a M422 board at the rate of .07 gph on low and .164gph on high. A board for a M441 provides a fuel flow at .12 gph on low and .319 gph on high. Using a M441 board on a M422 will cause an over firing condition by almost 100%. This is a very dangerous condition. Tom