ZDZ & RCS Support Direct support from Mike Dooley of RC Showcase for all your ZDZ and RCS Engine questions.

First ZDZ, what should I know?

Old 08-18-2008, 08:45 AM
Thread Starter
Join Date: Jan 2002
Location: Cornwall, UNITED KINGDOM
Posts: 146
My Gallery
My Models
My Feedback
Default First ZDZ, what should I know?

I've just purchased a part-built model that has a ZDZ40 fitted up front, not sure of the exact model tho it has a blue head. It's my first gas motor, there are several gas motors in my local club so general help should be ok, but is there anything specific I should know about this engine? I belive the engine has previously run in another model.

Fuel/oil mix?


chris-s is offline  
Reply With Quote
Old 08-20-2008, 12:58 AM
Oilsands's Avatar
Join Date: Mar 2006
Location: Fort McMurray, AB, CANADA
Posts: 157
Default RE: First ZDZ, what should I know?

I have a ZDZ 80 RV, so some of the stuff is simular. The oil/gas mix that is recommended is 40:1 after break in and premium gas. RC Showcase www.rcshowcase.com has some information on ZDZ engines, such as how to set the timing, adjustments of the H and L needles, etc. Also good source if you have any problems. Since it has an alumium head, get some never seize (high temp) and put a little on the spark plug threads. Do not over tighten the spark plug (only requires 7 ftlbs of torque) or remove it too many times, this can pull out the threads. If you do pull out the threads, you can purchase a tool and inserts to repair and get you flying again. They have a starting procedure that seems to work well, it is 5-5-1. That is with throttle at full open, ign off and choke on, flip the engine over 5 times (may need to flip over a few more time if the fuel line was dry), then with throttle at full open, ign off and choke off, flip the engine over 5 more times, then with throttle at idle (or 1 to 2 clicks above idle), ign on and choke off, flip over once and it should start. As with any gas engine, never run the engine lean. When setting the H needle, adjust to max rpm then back off to drop rpm down aprox 200-300 rpm. Setting the L needle, adjust a little at a time till you get a go transition between idle and full throttle, then recheck the H needle (as adjusting the L needle affects the H needle setting).
Oilsands is offline  
Reply With Quote

Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -8. The time now is 06:32 PM.