Thumper1

Does anyone know the thread size of the exhaust port of the Saito 91?
Thanks
Bill

TNRabbit

Go to the Engine Manufacturers Direct Support Forum one thread up from Glow Engines--they can answer your questions.

William Robison

My Feedback: (3)

Bill:

The Saito FA-91 is in the "Mid-block" series, they are all 12mm x 1.0mm thread.

Bill.

Thumper1

Thanks, Bill. I knew they were 12MM, but didn't know the pitch size.
Bill

Hobbsy

My Feedback: (102)

There is no MFG Support Forum for Saito.

William Robison

My Feedback: (3)

Dave and Bill:

I am trying to be the "Saito Support Forum." I have a good line into Horizon for questions I can't answer.

Bill.

bentgear

I think you do a pretty good job of it too.................. with some help from hobbsy.

Ed M.

William Robison

My Feedback: (3)

Ed:

Dave and I both thank yoou.

Bill.

Maelstrom

Bill Robinson, what about the Saito 72? Is it also 12x10?

Thanks,

Luis

PS: I think you do a great job as a moderator

William Robison

My Feedback: (3)

Luis:

The Saito 72 exhaust is also 12 x 1.0mm

Bill.

Maelstrom

Bill:
I am having trouble finding a flexible exhaust for the Saito 72. I found one a while back but I thought then it was too expensive. Now it is not even available at Horizon Hobbies. What would you recommend as an inexpensive alternative?
Is there a 90 degree connector I can use to attach the muffler? How important is the pressure nipple on the exhaust to pressurize the fuel tank?. I thought about building a flexible exhaust but the time is certainly not worth it unless the parts to build it are readily available.
Your thoughts would be appreciated.
Luis

William Robison

My Feedback: (3)

Luis:

I would have sent you to Horizon for the Saito supplied flex pipe. Pricey, but they did work nicely. Now you say they are no longer available.

If all you need is a hard bend coming from the cylinder, check the exhaust on the FA-200Ti, it has a 90 degree adapter coming out of the head, the standard exhaust can be screwed into it.

Alternately, go to your local plumbing supply house, they often have small diameter accordion tubing that can be welded to the original Saito head pipe, the accordion folds act as a muffler and the head pipe can be tapped for a pressure fitting.

I have run the Saito engines with a straight exhaust pipe. While the noise isn't objectionable, I've had fuel feed problems with the lowered pressure in the tank. It might work all right in your installation. Just have to try it and find out.

Bill.

JoeAirPort

My Feedback: (41)

I would 2nd that.

glowfuel

I have found some useful information from the following URL:

http://saito-engines.info/

w8ye

My Feedback: (16)

Flexible steel galvinized tubing from McMaster-Carr... 1/2" id 5/8"od 1 3/4" min rad #5262K14 $0.42/ft This is the smallest they show.

Standard metric pipe dimensions specify a 1. 5 mm thread pitch.

Enjoy,

Jim