Magnum 52 FS idle w/o glow driver
03-25-2006, 08:31 PM
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Magnum 52 FS idle w/o glow driver
My magnum 52 four stroke WILL NOT drop below 4000 rpm w/o a glow driver on it. the engine is relatively new with only about 45 minutes of run time on it...with the glow driver on the plug, the motor will run great, all the way down to 2200 rpm. if i drop the rpm below about 4000 without the glow driver on the plug, the engine just quits, no sputter, not choke, no nothing, just dies. I have tuned the top end to about 400 rpm off max and am trying to tune the low end, but it won't idle well enough to do so. i have tried a number of different settings on the low end with ZERO luck.
any suggestions???
15% powermaster
os type f plug
12x5 prop
i have a magnum 91 FS that runs great! and i haven't had any sort of problem with it, so i'm starting to get frustrated with the 52! i know they have potential, i'm just having a hard time finding it
thanks!
any suggestions???
15% powermaster
os type f plug
12x5 prop
i have a magnum 91 FS that runs great! and i haven't had any sort of problem with it, so i'm starting to get frustrated with the 52! i know they have potential, i'm just having a hard time finding it
thanks!
03-25-2006, 11:01 PM
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RE: Magnum 52 FS idle w/o glow driver
Call the folks that do the warranty work for Magnum engines. You should be able to idle lower than 4k rpm by now, assuming that you have tried a different plug (OS Type-F) and found the same results. They are great folks to work with. Don't struggle in the dark. It's a waste of time.
03-25-2006, 11:09 PM
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RE: Magnum 52 FS idle w/o glow driver
Try starting from scratch with the low speed needle. When they keep quitting at that rpm range, it can be hard to tell if it is rich or lean.
Close the throttle all the way down until only a small pin tip will fit into the throat past the barrel. Next, attach an extra piece of fuel line to the carb nipple. Now try to blow through the fuel line. Adjust the low speed needle until you can just barely blow air through the line. That will get your low speed needle very close to the correct setting. Now you can fine tune from there.
Close the throttle all the way down until only a small pin tip will fit into the throat past the barrel. Next, attach an extra piece of fuel line to the carb nipple. Now try to blow through the fuel line. Adjust the low speed needle until you can just barely blow air through the line. That will get your low speed needle very close to the correct setting. Now you can fine tune from there.
03-26-2006, 01:03 AM
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RE: Magnum 52 FS idle w/o glow driver
ORIGINAL: *JCB*
My magnum 52 four stroke WILL NOT drop below 4000 rpm w/o a glow driver on it. the engine is relatively new with only about 45 minutes of run time on it...with the glow driver on the plug, the motor will run great, all the way down to 2200 rpm. if i drop the rpm below about 4000 without the glow driver on the plug, the engine just quits, no sputter, not choke, no nothing, just dies. I have tuned the top end to about 400 rpm off max and am trying to tune the low end, but it won't idle well enough to do so. i have tried a number of different settings on the low end with ZERO luck.
any suggestions???
15% powermaster
os type f plug
12x5 prop
i have a magnum 91 FS that runs great! and i haven't had any sort of problem with it, so i'm starting to get frustrated with the 52! i know they have potential, i'm just having a hard time finding it
thanks!
My magnum 52 four stroke WILL NOT drop below 4000 rpm w/o a glow driver on it. the engine is relatively new with only about 45 minutes of run time on it...with the glow driver on the plug, the motor will run great, all the way down to 2200 rpm. if i drop the rpm below about 4000 without the glow driver on the plug, the engine just quits, no sputter, not choke, no nothing, just dies. I have tuned the top end to about 400 rpm off max and am trying to tune the low end, but it won't idle well enough to do so. i have tried a number of different settings on the low end with ZERO luck.
any suggestions???
15% powermaster
os type f plug
12x5 prop
i have a magnum 91 FS that runs great! and i haven't had any sort of problem with it, so i'm starting to get frustrated with the 52! i know they have potential, i'm just having a hard time finding it
thanks!
Usually if it idles with the glow driver on but quits w/o the glow driver, then the idle is too rich. Try the idle screw at 2 turns from fully closed, and gradually turn in at 45 deg increment until you find the ballpark.
03-26-2006, 11:21 AM
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RE: Magnum 52 FS idle w/o glow driver
I have a Magnum .52fs and it idles pretty low. Still breaking in, but the engine performs very good and is really reliable.
The setting for my low speed needle is 2 turns out and the high speed is about 2.5 turns out. This setting seem to be good for my engine.
MAS 12x6
OS-F plug
15% nitro
The setting for my low speed needle is 2 turns out and the high speed is about 2.5 turns out. This setting seem to be good for my engine.
MAS 12x6
OS-F plug
15% nitro
