ZDZ Engine Problem
07-10-2013, 04:14 PM
#1
Thread Starter
My Feedback: (6)
Join Date: Sep 2005
Location: KincardineOntario, CANADA
Posts: 277
Likes: 0
Received 0 Likes
on
0 Posts
ZDZ Engine Problem
I have a ZDZ80 in my Ziroli Hellcat. It has always run well, but now its' giving me problems. When i throttle up i stops. It does not matter where i set the low needle valve. I have tried all the way from 3/4 of A turn to 2 turns. I cleaned the filter, and tried fresh gas but rarely can i get it to full throttle. Any ideas?
Thanks.
Thanks.
07-10-2013, 05:57 PM
#3
Thread Starter
My Feedback: (6)
Join Date: Sep 2005
Location: KincardineOntario, CANADA
Posts: 277
Likes: 0
Received 0 Likes
on
0 Posts
RE: ZDZ Engine Problem
Nothing is a silly suggestion at this point. It is the original Falkon ignition so maybe it is pooched. I'll see if i can try a different ignition. Anything else to check?
07-11-2013, 02:03 AM
#4
RE: ZDZ Engine Problem
Have you tried to open the high needle? I would open it 3 to 4 turns to make sure fuel is flowing. When does the engine quit? During acceleration or after full speed is achieved?
07-11-2013, 03:56 AM
#5
Thread Starter
My Feedback: (6)
Join Date: Sep 2005
Location: KincardineOntario, CANADA
Posts: 277
Likes: 0
Received 0 Likes
on
0 Posts
RE: ZDZ Engine Problem
The engine runs nicely at full throttle. When i am setting it up i set the high end first. The problem is when i throttle down and then try to throttle back up...it stops then irregardless of low needle setting. I checked the plug this morning and it has a nice, dark tanned colour (not too rich, not too lean).
07-11-2013, 05:03 AM
#6
RE: ZDZ Engine Problem
Well if it's got a Falkon ignition it's pretty old. Usually those things either work or they don't. Suggest eliminating the the switch or whatever is between the ignition battery and the ignition as a troubleshooting technique. Now I'm stretching the old memory but IIRC the plate on the back of the crankshaft that makes the rotary valve intake work, can get loose and mess up the intake timing.
You may want to try contacting AMR for assistance, they are the Canadian importer/distributor for ZDZ.
You may want to try contacting AMR for assistance, they are the Canadian importer/distributor for ZDZ.
07-11-2013, 01:30 PM
#7
Thread Starter
My Feedback: (6)
Join Date: Sep 2005
Location: KincardineOntario, CANADA
Posts: 277
Likes: 0
Received 0 Likes
on
0 Posts
RE: ZDZ Engine Problem
After two other rebuilt carbs and an RCecell ignition, now wont even start. I have traced it back to the fact that the engine is not drawing fuel. Wonder what could stop the carb/engine from drawing fuel?
07-11-2013, 01:56 PM
#8
Senior Member
My Feedback: (2)
Join Date: Apr 2002
Location: Milwaukee,
WI
Posts: 663
Likes: 0
Received 0 Likes
on
0 Posts
RE: ZDZ Engine Problem
Make sure the pulse line/hole is making a proper connection to the carb. Sometimes the gasket
will block the hole if it is not aligned properly.
will block the hole if it is not aligned properly.
