Super Tigre breakin run Help
04-01-2008, 11:39 PM
#1
Thread Starter
Super Tigre breakin run Help
UPS delivered my new Super Tigre G-75 today. I mounted it on my test bench for a breakin run.
I am using a APC 12x7 or 12x8 prop and burning 15% fuel. Engine starts just fine and runs at idle ok. I followed the breakin procedures in the instruction book that came with the engine.
High speed needle is 3 turns open and idle is--as received. When going from idle to full throttle
at about half throttle it sounds like it starves itself out. I have tried to richen the high speed needle but am not having any luck. HELP
I am using a APC 12x7 or 12x8 prop and burning 15% fuel. Engine starts just fine and runs at idle ok. I followed the breakin procedures in the instruction book that came with the engine.
High speed needle is 3 turns open and idle is--as received. When going from idle to full throttle
at about half throttle it sounds like it starves itself out. I have tried to richen the high speed needle but am not having any luck. HELP
04-01-2008, 11:58 PM
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RE: Super Tigre breakin run Help
How much have you run it now? These engines do not break in quickly like a OS. You will need to run it very rich at full throttle for awhile to seat the ring. Use the hi-speed needle to regulate the speed and use a fuel with some castor in it. It is a messy process and you will have to burn through some fuel to get there, but you will be rewarded with a strong, long lasting engine for your efforts.
04-02-2008, 12:03 AM
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RE: Super Tigre breakin run Help
warningshot - attach your glow ignitor and open up the needle valve, I don't count turns out just open it up 4-5 and open the throttle, start at full thottle and keep it rich as per the manual. Might want to reduce the prop load on the engine to 70% of what you fly with. I run a 10x8 on my G75. You may want to try an 11x5 or 11x6 to break in. Let it run and continue as the manual says.
Its useless to start to set the bottom end until the engine has some run time on it. I don' t try to set the bottom end until the 4-5th tank full of fuel......
The G75 is a really good engine and I am sure that you will be happy with it.
Also in the supertiger support forum......there will be much info on this engine and setting the bottom end, midrange ect
Hope this helps
Richard
Its useless to start to set the bottom end until the engine has some run time on it. I don' t try to set the bottom end until the 4-5th tank full of fuel......
The G75 is a really good engine and I am sure that you will be happy with it.
Also in the supertiger support forum......there will be much info on this engine and setting the bottom end, midrange ect
Hope this helps
Richard
04-02-2008, 12:19 AM
#4
Thread Starter
RE: Super Tigre breakin run Help
ORIGINAL: YUKONFLYR
warningshot - attach your glow ignitor and open up the needle valve, I don't count turns out just open it up 4-5 and open the throttle, start at full thottle and keep it rich as per the manual. Might want to reduce the prop load on the engine to 70% of what you fly with. I run a 10x8 on my G75. You may want to try an 11x5 or 11x6 to break in. Let it run and continue as the manual says.
Its useless to start to set the bottom end until the engine has some run time on it. I don' t try to set the bottom end until the 4-5th tank full of fuel......
The G75 is a really good engine and I am sure that you will be happy with it.
Also in the supertiger support forum......there will be much info on this engine and setting the bottom end, midrange ect
Hope this helps
Richard
warningshot - attach your glow ignitor and open up the needle valve, I don't count turns out just open it up 4-5 and open the throttle, start at full thottle and keep it rich as per the manual. Might want to reduce the prop load on the engine to 70% of what you fly with. I run a 10x8 on my G75. You may want to try an 11x5 or 11x6 to break in. Let it run and continue as the manual says.
Its useless to start to set the bottom end until the engine has some run time on it. I don' t try to set the bottom end until the 4-5th tank full of fuel......
The G75 is a really good engine and I am sure that you will be happy with it.
Also in the supertiger support forum......there will be much info on this engine and setting the bottom end, midrange ect
Hope this helps
Richard
04-02-2008, 12:37 AM
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RE: Super Tigre breakin run Help
If you keep the plug lit and open up the needle so the engine four-srokes, it should continue to run. I would go through 4-5 tanks at least before making further adjustments. When the engine will hold a rich 2-stroke setting at full throttle without sagging, then it will be ready to fly, at a rich setting of course. The break in will probably be very hard on the plug as it always is, so you will want to put a fresh one in before flying.
I have a few of these ST engines in the .61-.90 size, and prefer them over the OS in this size.
I have a few of these ST engines in the .61-.90 size, and prefer them over the OS in this size.
04-02-2008, 12:49 AM
#6
Thread Starter
RE: Super Tigre breakin run Help
I have heard and read good things about them. I just need to get this one to run past mid range. I will open the high speed needle valve another turn or two and see what happens.
04-02-2008, 06:14 AM
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RE: Super Tigre breakin run Help
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
04-02-2008, 08:02 AM
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RE: Super Tigre breakin run Help
Warningshot,you only need to open/close slightly Low Speed Needle to achieve full throttle.Your symptom indicates wrong LSN adjustment.Most probably needs to open slightly.
04-02-2008, 08:20 AM
#9
Senior Member
RE: Super Tigre breakin run Help
Be sure to read the ST carb adjustment procedure Bax has posted under the SuperTigre factory support page.
http://www.rcuniverse.com/forum/m_1579985/tm.htm
http://www.supertigre.com/faq/product-faq.html#q22
Also, be sure the brass fitting for muffler pressure is open. I've seen them misdrilled and that can cause problems as well. Good luck.
http://www.rcuniverse.com/forum/m_1579985/tm.htm
http://www.supertigre.com/faq/product-faq.html#q22
Also, be sure the brass fitting for muffler pressure is open. I've seen them misdrilled and that can cause problems as well. Good luck.
04-02-2008, 11:17 AM
#10
Thread Starter
RE: Super Tigre breakin run Help
ORIGINAL: flipstart
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
04-02-2008, 11:43 AM
#11
Senior Member
RE: Super Tigre breakin run Help
ORIGINAL: warningshot
Problem is that when I open the throttle fully the engine dies out. I have not been able to get it passed mid range on any attempt.
ORIGINAL: flipstart
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
At the throttle point where it will stay running is it spitting a lot of fuel out of the exhaust? If so then lean it until it will run full throttle. If it is not spitting fuel out of the exhaust then you have a flow restriction somewhere in the fuel system.
Try pulling the pressure line off of the exhaust and putting your fuel pump line into it. Pull the other line off the carb and hold it away from yourself so you don't get fuel on you. Pump some fuel in through the pressure line and a strong flow should exit the line normally going to carb. If not there is a restriction in the plumbing going back to the tank or inside of it. (I've seen little white pieces of tank flashing get caught in the line and you couldn't see it from the outside but the engine wouldn't run right until the line was replaced.) If you are getting a strong flow from the supply line then thoroughly clean the carb by disassembling it and washing it all blowing out each piece checking for any obstructions. Reassemble and all should be well. Also, don't forget to check the muffler pressure tap for obstruction as per my previous post.
Hope you find it.
04-02-2008, 02:51 PM
#12
Thread Starter
RE: Super Tigre breakin run Help
ORIGINAL: Jezmo
Do you still have the glow driver on when it dies? It needs to stay on until the needles are set close to correct. If the mixture is too rich and the driver is removed the wet fuel will cool the plug filament and the engine will die.
At the throttle point where it will stay running is it spitting a lot of fuel out of the exhaust? If so then lean it until it will run full throttle. If it is not spitting fuel out of the exhaust then you have a flow restriction somewhere in the fuel system.
Try pulling the pressure line off of the exhaust and putting your fuel pump line into it. Pull the other line off the carb and hold it away from yourself so you don't get fuel on you. Pump some fuel in through the pressure line and a strong flow should exit the line normally going to carb. If not there is a restriction in the plumbing going back to the tank or inside of it. (I've seen little white pieces of tank flashing get caught in the line and you couldn't see it from the outside but the engine wouldn't run right until the line was replaced.) If you are getting a strong flow from the supply line then thoroughly clean the carb by disassembling it and washing it all blowing out each piece checking for any obstructions. Reassemble and all should be well. Also, don't forget to check the muffler pressure tap for obstruction as per my previous post.
Hope you find it.
ORIGINAL: warningshot
Problem is that when I open the throttle fully the engine dies out. I have not been able to get it passed mid range on any attempt.
ORIGINAL: flipstart
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
Just recently broke in 2 G90s on test stand. (finished the last one yesterday.) If you follow the break in procedure in manual, open 3 turns, start engine engine at 1/3 throttle, then after a minute, open throttle to full, and let run for 5 minutes, then the pinch and lean procedure starts.
Start over and you should be able to let the engine run at full throttle, it will be very rich. Open the throttle very slowly and start leaning high end gradually per the procedure. It is time consuming and you will use about a gallon of fuel. After that ordeal is over, you can lean the low end in very small increments to get a good idle and transition. Remember to set hi end each time you adjust the low end as the 2 needles work together.
As stated above, its messy, time consuming, but you will be rewarded with a strong long lasting engine. Both of my G90s are stump pullers, good idle and transition.
At the throttle point where it will stay running is it spitting a lot of fuel out of the exhaust? If so then lean it until it will run full throttle. If it is not spitting fuel out of the exhaust then you have a flow restriction somewhere in the fuel system.
Try pulling the pressure line off of the exhaust and putting your fuel pump line into it. Pull the other line off the carb and hold it away from yourself so you don't get fuel on you. Pump some fuel in through the pressure line and a strong flow should exit the line normally going to carb. If not there is a restriction in the plumbing going back to the tank or inside of it. (I've seen little white pieces of tank flashing get caught in the line and you couldn't see it from the outside but the engine wouldn't run right until the line was replaced.) If you are getting a strong flow from the supply line then thoroughly clean the carb by disassembling it and washing it all blowing out each piece checking for any obstructions. Reassemble and all should be well. Also, don't forget to check the muffler pressure tap for obstruction as per my previous post.
Hope you find it.
Used a drill bit to open up nipple. Filled up fuel tank and cranked engine. Success. Engine now runs like it should. I wish to thank everyone who give suggestions. Thanks for all the help.
04-02-2008, 07:08 PM
#14
Senior Member
RE: Super Tigre breakin run Help
I am glad you got it fixed. I am also thankful for the service you have given this country. Your signature says what many don't understand, "FREEDOM ISN'T FREE".
04-03-2008, 07:05 AM
#15
Thread Starter
RE: Super Tigre breakin run Help
ORIGINAL: Jezmo
I am glad you got it fixed. I am also thankful for the service you have given this country. Your signature says what many don't understand, "FREEDOM ISN'T FREE".
I am glad you got it fixed. I am also thankful for the service you have given this country. Your signature says what many don't understand, "FREEDOM ISN'T FREE".
