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Old 05-12-2008, 04:18 AM   #1
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Default MBX5R with OFNA starter box problems..

Hi all,
I got my new mbx5r and am having problems using a new ofna starter box 10245 (compact single 750 motor)

I understand the pinch is tight but i am more having problems with getting contact on the flywheel... the rubber wheel is wide and not very high.

is there any mods or methods for getting it to work better? i removed the motor and lined it up but once i put the motor back on it didn't hit the flywheel!

I have used the box and it has worked but has been a hassle everytime. its only worked without using the plastic guides on the starter. as soon as i try to use them i have problems.

ps. i do not want to dremel the chassis open further.

thankyou
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Old 05-12-2008, 05:26 AM   #2
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after more playing around i have worked out that the starter wheel will not go through the chassis far enough when the front mount is put onto the starter box which makes it hard to light up the starter each time.

it seems the ofna 10245 is no good for the mugen mbx5r useless anyone has some tips?

the wheel is just to wide and does not got intot eh chassis enough. i could maybe mod the box so the wheel is higher but then it will just rub on the sides of the flywheel hole

whats a good starter box known to work good with the mbx5r?

thanks all
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Old 05-12-2008, 05:28 AM   #3
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Hey Mitch,

I had a similar problem, the trick is to press down on engine cooling head, this is fine and good when the engine is cold, but once the engine gets hot you can either use a cloth/rag, or do as I do is install the glow ignitor and press on the glow ignitor.

Some say this is not the best method, but I have never had a problem.

Hope this is of some help.
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Old 05-12-2008, 05:37 AM   #4
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Mitch,

Let the starter box gain full revs for 2-3 seconds then press down and try to start the engine, this reduces stress on your starter box engine, my box is over 2yrs old same motor and I have broken- in 3 engines.
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Old 05-12-2008, 05:56 AM   #5
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thanks mate,

only problem is its just not hitting the flywheel i push down as hard as i can on the buggy and bottom the starter trigger out and it will still not get it with the mount on...

cheers
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Old 05-12-2008, 06:11 AM   #6
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Mitch,

Place car on box and press hard on the engine cooling head. Try and see if that works?
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Old 05-12-2008, 06:30 AM   #7
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Actually the ofna 10245 is the wrong starter box for an 1/8th scale buggy.
The diagonal starter wheel slot is on the wrong side; it should be on the left
side if the picture I'm looking at is correct. You something like the 10250 or
the 10246.
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Old 05-12-2008, 07:54 AM   #8
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you can bevel the edges of the chassis flywheel opening to allow the larger diameter wheel to go further into the chassis...i've had to do that with all my Mugens...its a bit of a nuisance, but whatever.
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Old 05-12-2008, 08:41 AM   #9
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Quote:
Originally Posted by topcat-lll View Post
Actually the ofna 10245 is the wrong starter box for an 1/8th scale buggy.
The diagonal starter wheel slot is on the wrong side; it should be on the left
side if the picture I'm looking at is correct. You something like the 10250 or
the 10246.
Ofna 10245 is the correct box. Ofna and every "non-paying attention" hobby store used the reversed image of the box. The starter wheel is actually on the other side than whats shown on Ofna's website.

I suggest you remove the engine and align the chassis so the wheel is dead centered through the hole in the chassis. I don't think you should need to cut the chassis at all, as I have worked with that box before and other Ofna boxes. Most don't align the chassis up correctly. I keep old worn out chassis just for starter box configurations. I have attached a pic on the 10245 box from Amain
Attached Thumbnails
MBX5R with OFNA starter box problems..-ofn10245.jpg  
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Old 05-12-2008, 09:30 AM   #10
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If it just wont fit, try bevelling the edges of the starter wheel, it's what I had to do.
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Old 05-12-2008, 02:57 PM   #11
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ok I had some luck last night. I took the motor off again and put the chassis on the starter and let it spin while i marked it. it only has 1mm spare on each side of the rubber wheel so it is damn tight!

I was using no rubber shaving as a indicator of a good fit I mark where the flywheel is to the hole (dead center) and then made sure the high point of the starter wheel matched that spot.

the trick was though to push down on the head as mention earlier in the post.
I have no idea why this would make a difference as when i push on the back of the car i am bottoming it out on the starter but it does work when pushing on the head.

thankyou jesussaves! and everyone else for trying.
cheers
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Old 05-12-2008, 03:27 PM   #12
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Its always best to push down on the engine. I do it with the glowplug igniter all the time. As for starter wheel, it usually wears down on the edges and will not hit the chassis as much as time goes on. You also could shave the edges a little with a file while its spinning to thin it a little.
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Old 05-12-2008, 03:34 PM   #13
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i have that same starter box from the look of it. it works on mine all you do is press down on the glo ignitor when you are starting it
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Old 05-12-2008, 03:55 PM   #14
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i just bought a mugen grey box so i wouldnt have to fight with it
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