jedimindtrick.
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Hello there..
Need some help with my nitro engine..
It is a Force 25 (OFNA?) engine in a GV XT2 1/8 Buggy..it has been in storage for a few years and have just decided to get back into the hobby.
It seems it was never broken in properly (if at all), when turning the crank by hand it is very sticky at TDC..
So, I was planning to break it in properly , But I was unsure of the stock needle settings where, the GV manual is pathetic, so is the DVD..I looked up the XTM version but they use a different engine so that was no luck..
I needed the settings for all needles including the MSN as I wasn't sure if it had been moved or not, so I contacted OFNA and although he gave me the stock settings, he confused me even further when it comes to the Low and Mid speed needles..
I was under the impression that the needles where universal, the LSN is where the throttle is (on ALL engines/carbs) and the Mid is on the opposite end..but in the first reply he told me that Force engines should not have a Mid needle and it would be a first he heard about it..so I took some photos and replied, then he sent me this link: http://www.ofna.com/guide-tune-basics.html clearly showing Force engines having a Mid needle.
But what confused me is the labeling of the LSN & MSN - (B) is labeled as LSN and (D) as MSN..but underneath it has the Hyper 21 engine, with, what I thought, was the correct orientation of the needles.
Is this common? I know that they can have a physically different orientation design of the carb, like the throttle being on the right instead of the left etc..but can the needles be different? How would someone know this was the case unless they look up each engine they touch first?
Could someone please help me to clear this up?
Any help would be greatly appreciated.
here are some photos..would my labeling be correct no matter what the ofna page says?
https://www.dropbox.com/sh/h6nse8g9xdjmu0g/AAA6ZTjG_GpLaM9PH8UMNxjVa
P.s, the Stock settings I was told:
HSN: 3 to 3-1/2 turns out from closed
LSN: Flush with carb body
(low speed needles on older Force engines are not in the carb slide but on the carb body 180 degrees from the slide)
Idle: set approx 1mm air gap at the carb slide
Mid to be set flush, then adjust low speed as needed.
Need some help with my nitro engine..
It is a Force 25 (OFNA?) engine in a GV XT2 1/8 Buggy..it has been in storage for a few years and have just decided to get back into the hobby.
It seems it was never broken in properly (if at all), when turning the crank by hand it is very sticky at TDC..
So, I was planning to break it in properly , But I was unsure of the stock needle settings where, the GV manual is pathetic, so is the DVD..I looked up the XTM version but they use a different engine so that was no luck..
I needed the settings for all needles including the MSN as I wasn't sure if it had been moved or not, so I contacted OFNA and although he gave me the stock settings, he confused me even further when it comes to the Low and Mid speed needles..
I was under the impression that the needles where universal, the LSN is where the throttle is (on ALL engines/carbs) and the Mid is on the opposite end..but in the first reply he told me that Force engines should not have a Mid needle and it would be a first he heard about it..so I took some photos and replied, then he sent me this link: http://www.ofna.com/guide-tune-basics.html clearly showing Force engines having a Mid needle.
But what confused me is the labeling of the LSN & MSN - (B) is labeled as LSN and (D) as MSN..but underneath it has the Hyper 21 engine, with, what I thought, was the correct orientation of the needles.
Is this common? I know that they can have a physically different orientation design of the carb, like the throttle being on the right instead of the left etc..but can the needles be different? How would someone know this was the case unless they look up each engine they touch first?
Could someone please help me to clear this up?
Any help would be greatly appreciated.
here are some photos..would my labeling be correct no matter what the ofna page says?
https://www.dropbox.com/sh/h6nse8g9xdjmu0g/AAA6ZTjG_GpLaM9PH8UMNxjVa
P.s, the Stock settings I was told:
HSN: 3 to 3-1/2 turns out from closed
LSN: Flush with carb body
(low speed needles on older Force engines are not in the carb slide but on the carb body 180 degrees from the slide)
Idle: set approx 1mm air gap at the carb slide
Mid to be set flush, then adjust low speed as needed.
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