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zdz 80b2rv engine

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Old 09-24-2010, 08:34 AM
  #1
firemansorel
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Default zdz 80b2rv engine

hi all, i have that engine and it run very well, very strong and never stop in the air... almost perfect, my big problem is that it si very, very hard to start. him using the right fuel and oil, the mixte oil/gaz is good. everything is ok. the tips in the intruction manuel those not work at all... it need more than 40 stroke to start everytime... can you help meplease.

20 spin for prime: full gaz with full choke
spin full gaz with full choke until engine strat once than spin choke off medium gaz.
this is my way of starting the engine. do you have a better way for this engine.

and the guys how built it did put pressure tap on muffler to put tank under pressure. do i really need that pressure from muffler??

thank everyone for your futur help....

sincerely

luc....firemansorel
maac 39624

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Old 09-24-2010, 09:19 AM
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Default RE: zdz 80b2rv engine

definitely do NOT pressurize the tank, it should be an open system
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Old 09-24-2010, 10:12 AM
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Default RE: zdz 80b2rv engine

what carb are you running seems i recalling reading were guys were changing out the stock carb and getting good results...?
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Old 09-24-2010, 10:31 AM
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Default RE: zdz 80b2rv engine

Does the choke plate have a hole or slight moon cut out of it? I so soldier it closed, that should help. After you modify the choke plate the way to start the engine is:
a. Close choke completely.
b. Open throttle half way.
c. Flip engine with ignition on until the engine coughs.
d. Take choke fully off.
e. Set throttle just above idle, flip until it starts, usually 3 to 5 flips.
Also, if the engine is hard to start, but runs great, you may be able to get it to start easier by richening the "L" needle a little.


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Old 09-25-2010, 09:08 AM
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Default RE: zdz 80b2rv engine

thank you guys for your help. i did install a new tank and did not install the pressure tap. do i need to install a overflow on tank to let the tank open, to let air come in the tank freely???

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Old 09-25-2010, 09:23 AM
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Default RE: zdz 80b2rv engine

YES!
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Old 09-25-2010, 09:25 AM
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Default RE: zdz 80b2rv engine

thank you all for your great advice.... sincerely luc brodeur
sorel-tracy, quebec, canada
esquadron du richelieu

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Old 09-25-2010, 10:41 PM
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Default RE: zdz 80b2rv engine

Vent your tanks vent line to the outside of the fuselage. I drilled a hole by the landing gear and glued a length of brass tubing into it and hooked the line to it on the inside of the fuse. Then loop your vent line behind the tank like this picture shows. That way on your down lines you won't pour gasoline into your prop.
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Old 02-09-2011, 09:50 AM
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Default RE: zdz 80b2rv engine

Change your ignition box to CDI Ignition and you will never have this problem again.
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Old 03-14-2011, 07:24 AM
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Richard A. Blatt
 
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Default RE: zdz 80b2rv engine

Procedure for installing a rotary valve on the ZDZ 80b2rv twin. Upon removing the rear cover the valve came out without me noticing the location of same. Thanks for any help. Rich
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Old 03-14-2011, 08:19 AM
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Default RE: zdz 80b2rv engine


Quote:
ORIGINAL: Richard A. Blatt

Procedure for installing a rotary valve on the ZDZ 80b2rv twin. Upon removing the rear cover the valve came out without me noticing the location of same. Thanks for any help. Rich
Suggest you contact Mike at TBM since he's the ZDZ guy who used to be with RCS before they went out of business and the importer/distributor franchise was picked up by TBM and he now works for those folks. No one from TBM checks this forum that I've seen, there may be other users who could help out but again, there's just not much activity on this forum anymore.
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