TT 54s engine tune
02-26-2007 | 06:00 AM
#1
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From: Broken Hill, AUSTRALIA
TT 54s engine tune
I have just fitted a new TT 54s to a 40 size tiger moth and it has all gone pear shaped.
My thought was to run a few tanks few on the ground (as per run in instruction) before heading out to fly. Problem is I just can't get this engine to run properly at all. (btw engine is inverted)
First attempt was with 18% blue oil and 10% nitro. Could not get to full throttle and detonation occuring.
On advice I changed fuel mix and plug.
Current fuel mix 15% blue coolpower, 5% castor and 5% nitro. Using a 11x7 prop. Enya3 plug.
Things improved but still no joy. I checked the tappets and the gap was way above specs. Adjusted to correct setting and tried again with little improvement. I have also tried placing the prop at different positions.
Can anyone advise whether the fuel,prop, plug combination is ok and where a good start point for the needles would be ( out of frustration I pulled the idle mixture screw out to check and did not reference factory setting) I have no idea even where to start from now.
Any help would be appreciated.
Edon
My thought was to run a few tanks few on the ground (as per run in instruction) before heading out to fly. Problem is I just can't get this engine to run properly at all. (btw engine is inverted)
First attempt was with 18% blue oil and 10% nitro. Could not get to full throttle and detonation occuring.
On advice I changed fuel mix and plug.
Current fuel mix 15% blue coolpower, 5% castor and 5% nitro. Using a 11x7 prop. Enya3 plug.
Things improved but still no joy. I checked the tappets and the gap was way above specs. Adjusted to correct setting and tried again with little improvement. I have also tried placing the prop at different positions.
Can anyone advise whether the fuel,prop, plug combination is ok and where a good start point for the needles would be ( out of frustration I pulled the idle mixture screw out to check and did not reference factory setting) I have no idea even where to start from now.
Any help would be appreciated.
Edon
02-26-2007 | 07:07 AM
#2
RE: TT 54s engine tune
try a fox miracle plug or OS type F just a guess. martin
I use the OS f in all my 4 strks 30 thru 91 no issues have not used a fox but read its ok
In the moth I would guess the engine inverted thus tank height important pickup even with carb also
the TT is it a single needle with air bleed or true 2 needle carb?? if aire bleed hole about 1/2 way on carb
ith true low speed adjust start 1 turn out from closed if you can turn plane upside down to get engine upright for adjustment and an on board glow heater may help too
I use the OS f in all my 4 strks 30 thru 91 no issues have not used a fox but read its ok
In the moth I would guess the engine inverted thus tank height important pickup even with carb also
the TT is it a single needle with air bleed or true 2 needle carb?? if aire bleed hole about 1/2 way on carb
ith true low speed adjust start 1 turn out from closed if you can turn plane upside down to get engine upright for adjustment and an on board glow heater may help too
