Engine bogging

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R

Rory

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Hamilton near Glasgow
Petrol tuning is new to me having been all nitro up to this point.

Took my car for a very quick run around a carpark earlier, everything works as it should which is nice.

Waited til it had warmed up a bit and went for a little bit of revs but it was bogging down and refusing to rev when I gave it a lot of throttle ... is this the engine running too rich? Is it the high speed needle I should lean a little bit ?
 
Rory said:
Petrol tuning is new to me having been all nitro up to this point.

Took my car for a very quick run around a carpark earlier, everything works as it should which is nice.

Waited til it had warmed up a bit and went for a little bit of revs but it was bogging down and refusing to rev when I gave it a lot of throttle ... is this the engine running too rich? Is it the high speed needle I should lean a little bit ?
Click to expand...

is it run in mate.
 
Rory said:
I was trying to get the revs up but thats when its bogging and refuses to rev
Click to expand...

Sounds like it's running rich, turn the 'H' needle clockwise (in) a touch then run again. Need to make sure it's hitting the height of it's rev range then turn it back just a little to make sure you are getting good lubrication and cooling.

This needs to be done slowly as sometimes the engines don't react quickly to adjustments so take your time.

I was talking to Rich at Rossendale Models about running in and they all go racing but said most guys he races with don't bother running in. If you get 1 tank through it youv'e done well. making sure the tune is right is more important. Looking at the colour of the spark plug can tell you alot. Do a search on google for spark plug colour charts for 2 stroke engines.
 
Last edited:
BiggaJ said:
Sounds like it's running rich, turn the 'H' needle clockwise (in) a touch then run again. Need to make sure it's hitting the height of it's rev range then turn it back just a little to make sure you are getting good lubrication and cooling.

This needs to be done slowly as sometimes the engines don't react quickly to adjustments so take your time.
Click to expand...

I'll do that tonight hopefully, I thought it sounded rich and was just choking for air.
 
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