GMS 1.20 - A good engine?
03-30-2004 | 09:02 PM
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From: CampinasSaoPaulo, BRAZIL
GMS 1.20 - A good engine?
Hello.
Im about to buy an GMS 1.20 engine to replace my ASP 91 in my CG Ultimate 10-300, but i have a few questions:
- They are difficulty to ajust ?
- What about the break-in before flying?
- They run just like an 2 stroke 120 or is just bull**** and they are not strong?
- They have those inside explosion boxes in the engine's wall?
i heard about some problems in GMS engines like air-leaks, those problems anyone here found in the 120 ?
thanks for your help.
DanieL
Im about to buy an GMS 1.20 engine to replace my ASP 91 in my CG Ultimate 10-300, but i have a few questions:
- They are difficulty to ajust ?
- What about the break-in before flying?
- They run just like an 2 stroke 120 or is just bull**** and they are not strong?
- They have those inside explosion boxes in the engine's wall?
i heard about some problems in GMS engines like air-leaks, those problems anyone here found in the 120 ?
thanks for your help.
DanieL
03-30-2004 | 10:01 PM
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From: Brisbane, AUSTRALIA
RE: GMS 1.20 - A good engine?
I got my GMS 120 off the self the other day and thought I would give it a second chance.
I have it on a 66" Cap232, I had a YS 110 4 stroke on the plane spinning a 15/8 prop. The GMS is running on 20%nitro and an OS four stroke plug and is idling at 1800 to 2000 rpm. With a 16/8 prop I get 8200 rpm. The engine out performs an YS110, but you would expect it to. I would recommend a four stroke plug! and at least 10% nitro.
Tune up was fine, just using exhaust pressure for the tank. If money was no object I would buy a Moki 135 instead of a GMS120 or even an OS120 FS.
Not bad, but they are a cheap engine and YOU GET WAS YOU PAY FOR.
I have it on a 66" Cap232, I had a YS 110 4 stroke on the plane spinning a 15/8 prop. The GMS is running on 20%nitro and an OS four stroke plug and is idling at 1800 to 2000 rpm. With a 16/8 prop I get 8200 rpm. The engine out performs an YS110, but you would expect it to. I would recommend a four stroke plug! and at least 10% nitro.
Tune up was fine, just using exhaust pressure for the tank. If money was no object I would buy a Moki 135 instead of a GMS120 or even an OS120 FS.
Not bad, but they are a cheap engine and YOU GET WAS YOU PAY FOR.
03-31-2004 | 01:10 PM
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From: OR
RE: GMS 1.20 - A good engine?
I have two of these engines and like them very much, I think I got more than I paid for when I bought these engines. As to your questions, 1. They are very easy to adjust, just set the hi-speed needle a little rich of max RPM and adjust the lo-speed needle for a good transition from idle. 2. I ran about two tanks through mine before flying (about 32 Oz.). 3. Yes they run just like a 2-stroke 120 (which they are). 4. I have no idea what an inside explosion box is (maybe a muffler)?
I run mine on 5% nitro fuel and an OS 'F' glow plug. they start easy, run fine, and never quit until you shut them off. [8D][8D].........RJ
I run mine on 5% nitro fuel and an OS 'F' glow plug. they start easy, run fine, and never quit until you shut them off. [8D][8D].........RJ
03-31-2004 | 04:29 PM
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From: ionia, MI
RE: GMS 1.20 - A good engine?
i had one in my kangke 232/120 swinging a 18-6 prop it flew the plane to scale, the motor performed great, even if it wasnt ran for 6 weeks, it never hesitated to start, i only had to adjust the needles once after i broke it in with a tank of fuel (have a bisson muffler on it) i believe its the best bang for the buck out there brian
04-01-2004 | 03:27 PM
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From: CampinasSaoPaulo, BRAZIL
RE: GMS 1.20 - A good engine?
ORIGINAL: RJConnet
I have two of these engines and like them very much, I think I got more than I paid for when I bought these engines. As to your questions, 1. They are very easy to adjust, just set the hi-speed needle a little rich of max RPM and adjust the lo-speed needle for a good transition from idle. 2. I ran about two tanks through mine before flying (about 32 Oz.). 3. Yes they run just like a 2-stroke 120 (which they are). 4. I have no idea what an inside explosion box is (maybe a muffler)?
I run mine on 5% nitro fuel and an OS 'F' glow plug. they start easy, run fine, and never quit until you shut them off. [8D][8D].........RJ
I have two of these engines and like them very much, I think I got more than I paid for when I bought these engines. As to your questions, 1. They are very easy to adjust, just set the hi-speed needle a little rich of max RPM and adjust the lo-speed needle for a good transition from idle. 2. I ran about two tanks through mine before flying (about 32 Oz.). 3. Yes they run just like a 2-stroke 120 (which they are). 4. I have no idea what an inside explosion box is (maybe a muffler)?
I run mine on 5% nitro fuel and an OS 'F' glow plug. they start easy, run fine, and never quit until you shut them off. [8D][8D].........RJ
One more question... in my CG Ultimate, the ASP .91 spinning a 15x6, make the famous torque-roll, but not easily.....the GMS 120 can do this ?
regards
DanieL
04-01-2004 | 09:55 PM
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RE: GMS 1.20 - A good engine?
ORIGINAL: Brazilian_Ace
Inside explosion boxes on the wall are not the muffler, is like an inside cave on the wall, they are 3.
regards
DanieL
Inside explosion boxes on the wall are not the muffler, is like an inside cave on the wall, they are 3.
regards
DanieL
You mean the bypass ports?
04-02-2004 | 11:52 AM
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From: CampinasSaoPaulo, BRAZIL
RE: GMS 1.20 - A good engine?
ORIGINAL: JimTrainor
You mean the bypass ports?
ORIGINAL: Brazilian_Ace
Inside explosion boxes on the wall are not the muffler, is like an inside cave on the wall, they are 3.
regards
DanieL
Inside explosion boxes on the wall are not the muffler, is like an inside cave on the wall, they are 3.
regards
DanieL
You mean the bypass ports?
Onde more question.....in my Ultimate, i put the pipe inside the plane, the pipe of the ASP 91,,,,there is some pipe for the 120 ?
regards
DanieL
