RCS/SV 26cc

[opjose]

	Quote: Originally Posted by CA
	Its the 300 its a couple years old now,,but im sure thay still have them,,move the sensor in the direction of the prop as far as you can,,then tune

I have a couple of these engines and I don't seem to be getting the power I should out of them.

You say to move the sensor "in the direction of the prop", do you mean to move it in the direction of prop rotation as far as it will go?

Did this improve the power output for you?

Thanks.

[timbo0279]

I just received one of these motors for a 106" Citabria build I have going at the moment... it certainly looks the part...

Any idea why the crank case and cylinder is spray painted?? I would have thought for cooling purposes and the like, leaving it as bare metal would have been preferable... but I may be wrong...

I will run a few tanks through it with the ignition sensor where it is.. after that Iwill give moving the sensor a try.. see what happens... I will be running a Xoar 18x8 prop on it...

[starzak]

Hey, I've got one of these engines, and I can't richen the thing up. It seems to be getting leaner with each run. What's wrong ?

Thanks.

zak

[bodofish]

Air leak, clogged jet???? And for those that would like to get a little more poop out of one, there seems to be quite a few hop up parts for these little motors. They're a hot commodity in the goped/scooter relm. There are big bore kits that up the anty to 30cc at 4 to 4.5 ponies depending on which liar (sales person) you talk to.

[timbo0279]

	Quote: Originally Posted by starzak
	Hey, I've got one of these engines, and I can't richen the thing up. It seems to be getting leaner with each run. What's wrong ? Thanks. zak

have you checked the carby screans?? If there is debris clogging the screens it could be restricting fuel flow...

[timbo0279]

	Quote: Originally Posted by bodofish
	Air leak, clogged jet???? And for those that would like to get a little more poop out of one, there seems to be quite a few hop up parts for these little motors. They're a hot commodity in the goped/scooter relm. There are big bore kits that up the anty to 30cc at 4 to 4.5 ponies depending on which liar (sales person) you talk to.

Have you got a link to any of these mod kits??

[bodofish]

	Quote: Originally Posted by timbo0279
	Have you got a link to any of these mod kits??

How's this for ya???? http://www.davesmotors.com/s.nl/c.88...t.A/id.4753/.f

[timbo0279]

I finally got this engine on my test bench over the weekend.. with mixed results...

After double and triple checking everything before I started, I closed the choke and primed the motor and after it drew the fuel to the carby I gave it another 10 or so flips just to make sure all the parts were well lubed before the first start... I then connected the battery to the ignition and it started on the second flip.... and idled nicely for about a minute.. then died... and do you think I could get it started again... NO....

I tried everything, I changed both the needles to half a turn rich , then half a turn lean from the factory to see if that was the problem... no help... I changed the ignition sensor location as per previous posts on this topic.. no help... so I reset everything to where it came as stock..

I knew the plug wasnt the problem becasue it was caughing and spluttering and wanting to go..... but I pulled the plug out anyway... and it was well wet.. as can be expected from 45 mins of hand cranking..... but it did have a reasonably large lump of what looked like black silicon sealant lodged down the side of the central spigot... so I cleaned that out and put the plug back in...

By this time I was well frustrated and had a very sore arm from 45 mins or so of hand cranking.. so I walked away from it for 20 mins... then came back and had another go.... and after a bit of stuffing around it came to life and idled but wouldnt go any further than that... as it turned out the idle mixture was way too rich... so I fixed that at a high idle... and then it coughed and suddenly started revving much better.. as if something had been cleared from inside the carby... more black silicon?? hard to say.. but definately a possibility...

From then on it ran much better and I got it to rev... turns out the mixtures were well off the mark... bottom end was about a turn and a bit too rich and the top end was about a turn too lean... so much for factory setting... but I ran it for about 6 or 7 minutes and then shut it down to try a hot start... which it did no problems...

My arm was aching after that and I had enough by then so I called it a day... This engine was really cheap for what you get.. but dont expect it to be a plug and play motor.. they will need a bit of attention...

[mrbigg]

Mine started right up when new. Been flawless ever since.

[mrbigg]

Here's a video.

YouTube- Broadcast Yourself.

[timbo0279]

My motor is alright now... and I think / hope it will only improve with more running time.. but it was a real effort to get it to that point...

[starzak]

	Quote: Originally Posted by CA
	Its the 300 its a couple years old now,,but im sure thay still have them,,move the sensor in the direction of the prop as far as you can,,then tune

If you move the sensor in the direction that the prop turns, counter-clockwise looking at the front, are you not retarding the spark ?

zak

[timbo0279]

does anyone know what the actual factory setting is supposed to be with regards to the spark advance??

[rcign]

Actual timing for ANY spark ignition gasser on the planet is 29 to 30 degrees before top dead center at WOT..PERIOD..Regardless of how it gets there, spark plug size, brand, or ignition manufacturer...

[timbo0279]

	Quote: Originally Posted by rcign
	Actual timing for ANY spark ignition gasser on the planet is 29 to 30 degrees before top dead center at WOT..PERIOD..Regardless of how it gets there, spark plug size, brand, or ignition manufacturer...

Excellent.. thanks.. I will check my motor out tonight.. make sure its right, seeing as I have changed it a few times to try and get it running...