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Custom ZDZ 120 BRV2 Enige Trouble

Old 02-21-2015, 09:10 AM
  #1  
ThonasSwake
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Default Custom ZDZ 120 BRV2 Enige Trouble

Hi everyone,
Iím new to this forum and am here to solicit any useful feedback on some major issues I am having with my ZDZ 120BRV2 engine. This engine has a custom exhaust made by ZDZ and is also water-cooled. The engine has a standard Walbro carburetor.
I am unable to get the engine to idle properly. I have tried different pin settings and continue to experience difficulties with the engine. The major problem is that the engine does not idle and that it does not run smoothly.
I have uploaded some videos to YouTube for you to look at.
Thanks

http://youtu.be/Zhap9emhx7I
http://youtu.be/TBrGhp7ASPo
http://youtu.be/ELf2GGlFWZI
http://youtu.be/WI-8vZjA3LI
http://youtu.be/v3JhuW6IEN8
Old 02-21-2015, 12:59 PM
  #2  
Tony Hallo
 
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Is there a flywheel installed? Would think might help smooth thing out
Old 02-21-2015, 05:06 PM
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dubs1946
 
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If it was me, i would check the spark, ignition,plugs.timing.
I cannot see any prop..or flywheel.
Get the engine to run at a fast tick over if you can or just to run.
Then get to the low needle with the engine running turn the low needle until it will not speed up any more then reduce the throttle and see if it will hold a slower speed.
A good starting point is H 1.5 L.1.5 if it will not run at that as your first video it could be a blockage in the small filter in the carb.
Then i would start swapping things plugs, ignition,and if need be carb.
Its always good to trouble shoot problem engines keep us informed of the solution.

Last edited by dubs1946; 02-21-2015 at 05:10 PM.
Old 02-21-2015, 05:06 PM
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dubs1946
 
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There are some really good engine guys on this forum i am sure they will help

Last edited by dubs1946; 02-21-2015 at 05:12 PM.
Old 02-23-2015, 02:25 AM
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ThonasSwake
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thanks guys! @Tony Hallo: We do not have a flywheel installed on the engine.
@dubs1946: I will try your suggestions
, do u think I should fix the propeller when setting up the engine, if not, would that change anything in the engines behavior?
Old 02-23-2015, 03:34 PM
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dubs1946
 
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Yes it must have something on the nose, good luck, just get it going and try fiddling with the needles as it runs, don,t be frightened of the needles if you lean it to much it will slow down if you richen it to much it will will not run flat chat and burble. Keep the water running so as not to overheat it
Dave
Old 02-25-2015, 02:35 AM
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Tony Hallo
 
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I can't image you will get a reliable idle without a prop or flywheel installed.
Old 03-03-2015, 07:19 AM
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mrbigg
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Put the prop on for sure.

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