Dead motor ! ?

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buzzkill

buzzkill

Mad?scientist
Messages
962
Location
SLO California
Well I got the Rovan buggy today 32cc motors, checked stuff out all seemed ok , mixed my fuel 25:1 with a synthetic oil and ran it for about 20 min at an idle , all good , did that 2x's saw smoke so it was not lean.
then I ran it real easy in the drive way changing rpm;s all the time no full throttle ( I used to race 2 stroke karts so I know when a motor is right ) all good so far seemed fine , I did notice a slight hickup in it but no big deal .
I took it out back an opened it up just a little ran fine then it started laggin on throttle bad response , so I figured let me check the plug and see if it is fat or lean ( not much smoke ) I pulled the plug and it looked good , brown color no white ! , BUT when I pulled the plug the threads were crap !! I mean BAD I had broken threads in the plug threads ! WARNING so I used some WD40 to lube it slightly so it would not bind , started it up seemed ok ! and checked the tuning , the H speed was at 1 turn ! I pulled the plug again and it looked ok , put it back in and NO FIRE at all , checked spark all good NO FIRE , pulled plug put my finger in th eplug hole and pulled the starter NOTHING frickin no compression.
Toast , guess I gotta call them now and get a new one ????
 
buzzkill said:
Well I got the Rovan buggy today 32cc motors, checked stuff out all seemed ok , mixed my fuel 25:1 with a synthetic oil and ran it for about 20 min at an idle , all good , did that 2x's saw smoke so it was not lean.
then I ran it real easy in the drive way changing rpm;s all the time no full throttle ( I used to race 2 stroke karts so I know when a motor is right ) all good so far seemed fine , I did notice a slight hickup in it but no big deal .
I took it out back an opened it up just a little ran fine then it started laggin on throttle bad response , so I figured let me check the plug and see if it is fat or lean ( not much smoke ) I pulled the plug and it looked good , brown color no white ! , BUT when I pulled the plug the threads were crap !! I mean BAD I had broken threads in the plug threads ! WARNING so I used some WD40 to lube it slightly so it would not bind , started it up seemed ok ! and checked the tuning , the H speed was at 1 turn ! I pulled the plug again and it looked ok , put it back in and NO FIRE at all , checked spark all good NO FIRE , pulled plug put my finger in th eplug hole and pulled the starter NOTHING frickin no compression.
Toast , guess I gotta call them now and get a new one ????
Click to expand...

Yea ,the threads on the plug hole isnt too good on these cheap engines ,they fit sloppy an you have to be real careful
on tightening them!...:unsure:
 
Striikar said:
Unfortunately I've heard this story before.Contact them and get a replacement engine.
It's a matter of principle.
Click to expand...
Ya I emailed them just now , with this posting , it was crap And I knew that was a possibility I deal with China alot and you take your chances , from what I have read they will take care of it , not my fault IMO

these damn things have more freakin parts than my real size touring car LOL !
 
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cbaker65 said:
Yea ,the threads on the plug hole isnt too good on these cheap engines ,they fit sloppy an you have to be real careful
on tightening them!...:unsure:
Click to expand...
I noticed it was not tight when I first pulled it to check the burn condition , they need to just use a CHEAP anti-seize compound on them ! 100% improvement for threads
 
I just heard from ROvan they are sending a me a top end rebuild kit , I asked them to please check the threads first LOL ! anyhow that pretty good customer support for a knockoff company. heres pix of the piston , with locked up ring , metal on metal contact from the spark plug threads getting into the cylinder , also broken starter ! duhhh . No burn on the piston so not a lean condition.
Ok suggestions on a starter ??IMG_20200921_105607777.jpgIMG_20200921_110933843.jpgIMG_20200921_110941909.jpg
 
Last edited by a moderator:
I am looking at the CY starter from DDM with new catch plate , why change the flywheel ? DAMN now that I am looking at the pawl how does that stay on ? it does not look like it is threaded ??

also a new filter the stock one is impossible to get on/off, this one, Spyder Competition Series Tall Stack Air Filter for HPI Baja 5B/5T/5SC
 
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buzzkill said:
I am looking at the CY starter from DDM with new catch plate , why change the flywheel ? DAMN now that I am looking at the prawl how does that stay on ? it does not look like it is threaded ??

also a new filter the stock one is impossible to get on/off, this one, Spyder Competition Series Tall Stack Air Filter for HPI Baja 5B/5T/5SC
Click to expand...
The flywheel you have has been modified for the prawl. The cy starter doesn't need the prawl. So you need a normal flywheel
This is all you need. Don't need to reuse that pawl or anythin
Pullstart
http://885035.shop.netsuite.com/s.nl?c=885035&n=1&it=A&id=12603

Flywheel
http://885035.shop.netsuite.com/s.nl?c=885035&n=1&it=A&id=1362
buzzkill said:
I am looking at the CY starter from DDM with new catch plate , why change the flywheel ? DAMN now that I am looking at the pawl how does that stay on ? it does not look like it is threaded ??

also a new filter the stock one is impossible to get on/off, this one, Spyder Competition Series Tall Stack Air Filter for HPI Baja 5B/5T/5SC
Click to expand...
The stock filter will do fine. But if you REEAALLY want to change it , I have a ddm velocity stack and TGN easy clearence air filter with a tgn redneck (I oiled both the air filter and redneck, some do differently ) and I recommend it to anyone ?
 
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