FNQFLYER

With  this vibration thing, both Saito and OS make really good engine mounts why would you use anything else.  I am with the previous correspondent that said he had never had any mufflers come loose and didn't use any locking compound.  I put forward the suggestion based on past experience but for me, balanced props good metal mounts (except when I am saving weight and have only short engine runs eg O/T duration events) and I have never repeat never had any problem with any fourstroke to date that I have owned from new. 

w8ye

My Feedback: (16)

I've never had any problems with four stroke mufflers and I don't do anything special or use anything on the threads. I even use the plastic motor mounts.

Hobbsy

My Feedback: (102)

John, if you're curious about the difference in size between the old FA .40 and your new .40a, here's a picture.

blw

My Feedback: (3)

Lopflyer- I use only the Great Pains plastic mounts and never had a problem. I use the self tapping 6-32 hex head screws. I've had two nose first crashes with the mounts torn from the firewall, and the screws held firm. They were bent quite a bit in the first crash, but they held.

Mike- Plumbers tape is sometimes labeled as virgin teflon. Maybe marketing knows that guys will jump on the virgin kind first when they have the the chance???

I've never had a muffler loosen or give any problems.

#715 for Broken Wings. Welcome aboard.

tacx

My Feedback: (1)

Hi All,

I would like to join the club. I have a 220 S I that I purchased used. It was mounted in a 150 Twist. Flew the plane maybe 5 times when it went dead stick on the last flight. I was just cruising about half throttle when it quit. Got the plane down safe. After some investigation I found that the cam gear had lost four teeth. I ordered a new cam gear and it finally came in after waiting 2 months for it. Anyway, My question is....Before I put the engine back together what other things should I check? I don't know why the cam gear lost the teeth in the first place. So, what should I look for to see what might have been the cause. What kinds of things would cause the lose of teeth. I'm fairly new to 4 strokes. I have rebuilt 2 strokes, but never a 4 stroke. Any help and suggestion would be greatly appreciated. Also, how do I check to tell if the bearings are OK?

Thanks in advance

Tom

w8ye

My Feedback: (16)

As long as the bearings are smooth, they should be OK.

You might instect the crankshaft carefully in case there are teeth missing on the gear.

Where did those gear teeth go? Sometimes they get into the bearings

Look at your cam followers also, they may have wear on the mating surface?

Jaybird

My list:

Sig J-3 Cub - Saito .50 - side mount - not currently flying
Hangar 9 J-3 Cub - Saito .56 - floats and skis - side mount - 15% MV CoolPower -bought new w/plane in 1994
BUSA Eindecker 80" - Saito .80 - inverted - 15% MV CoolPower - used bought from my brother 1998
Midwest Super Stearman - Saito .91 - side mounted 15% MV Coolpower - bought used in 2000
Cermark 1/4 Scale Pitts S2-B - Saito 1.50 - side mount - 20% - bought w/airplane used in 2009

Do I get a number now?

Jaybird

Broken Wings

My Feedback: (20)

WOW!, cute little bugger isn't it.

tacx

My Feedback: (1)

w8ye,

I flushed the engine out pretty good. Lost 4 teeth, but only found 3 when flushing. Do I have to remove the bearings to make sure the other tooth isen't in there? Didn't really want to do that, but if I must then I must.

Will any wear on the cam followers be easy to spot? Should I put new ones in anyway?

Thanks

Tom

w8ye

My Feedback: (16)

Wear on the cam followers is easy to see

That missing tooth may have been the original that gout ground up when it took out the others?

Those little metal particles may be in the bearings? If they are, you can feel it.

The little metal pieces will go past the shields on the bearings.

Hobbsy

My Feedback: (102)

When the 40a first came out Horizon sort of claimed it was the same size as the little .30 but its slighlty larger and mounts in a larger foot print.

mike109

G'day And the FA-40a engines run really well too. I have two. One is in an 80% AstroHog mounted upright and the other is in a Phoenix Tiger Moth mounted inverted.

I have seen that the airbleed carbys don't run well inverted. Well the one in my Tiger Moth does. I originally flew the Tiger with an FA-30 but it was just a little underpowered and the 40 was the perfect fit and power match for the plane.

The little AstroHog is a really sweet flying plane and the little Saito suits it perfectly. I am no aerobatics pilot but a friend put it through its paces and declared it was "the best plane I have flow this year" and he loved the way the engine worked with it. (He is a real OS engine man too so this is real praise coming from him.)

Jaybird

Helloooo! Am I going to get a number?

Jaybird

kd8x

What kind of RPM's should I expect to get out of a Saito 72 running a MA K-series prop 13-6 and 15% cool power fuel???? I am taching 9000 rpm but shouldn't that be higher??? thanks for the help....

mike early

That's a wide prop. Those numbers seem fine.

N1EDM

My Feedback: (2)

Jaybird,

I think that blw hands those out... My guess is that you certainly qualify. Blw checks in pretty often so he should see you....

Bob

w8ye

My Feedback: (16)

BLW will be along within a few days. He may be involved with a big project right now? I know he had a big event (for him) coming up.

Craig 01

New does not mean it is perfectly serviceable unfortunately,recheck for blockages and vacuum/air leaks and the seal between end float button and rear case/plenum.Check valve seal and spring tension.If plugs,fuel and tank including lines are all checked good it has to be an overlooked problem with the carb including spray bar location and mixtures and or the engine itself.Work through a process of elimination as if you have just aquired the engine starting fresh.

w8ye

My Feedback: (16)

Also on the three cylinder radials the placement of the distribution plate behind the carb is critical. Refer to the instruction manual.

barchiola

My Feedback: (6)

hi all,
i've got a 1.50 in the swap shop that runs perfect with less than two gallons of fuel total through it. it's the white box version with the box, tools, mount, and prop included.
asking $210 shipped in the US.
thanks,
bart

jay1st

Hi guys, I can, now, officially be part of the SAITO club!
Got my 150 GK and ran a tank through it to start the break-in process on a test stand.

But I have a couple of Qs.
I bought a RC specialities muffler with a 90° coupler to fit inside the cowl, and in fact I had to move the carb manifold on the side to accommodate the muffler.
Basically, the muffler exit is straight inline with the engine, and the carb is moved to the side by 30°.
It's mounted inverted and the carb was already very low compared to the fuel tank, and now it's slightly lower than before.

Any problems with that ?
And I am planning to use an onboard glow system for start up and also for idle.

w8ye

My Feedback: (16)

You might experience fuel siphoning out through the carb?

blw

My Feedback: (3)

Jim- packing to move has begun almost full time. I'll be glad when this all over and done with, but it's worth it in the end.

correction: ULPILOTMH is #716 (not 715)

717- Tacx

718 Jaybird

719 Jay1st

pulcastro

I have an older Saito 72 that runs great, but, while tuning it on the ground, the needle value seems to have little to no effect. I've set the valves many times, but still no changes.
Any ideas?

w8ye

My Feedback: (16)

You may need to open your low speed a little?