550XP vs MS362
- Thread starter blsnelling
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I figured the higher the number the higher the flow, similar to richening the mixture as a need for more fuel. Good to know the true meaning.
So if you see low numbers would that indicate a poor quality fuel or mix?
I put some runtime on the 550 this afternoon. The carb definately has to be replaced. It had to be tried though. One of the risks of boring out a carb is run-on, where it doesn't want to come back down to idle. It's dangerous the way it is. It's not a matter of the carb "learning" either. It simply needs replaced. No big deal. On the flip side, the saw seams to have really picked up some RPMs with the lates strato port timing chainges and the runtime to settle the carb in.
[video=youtube_share;4Of_0ZNGeLA]http://youtu.be/4Of_0ZNGeLA[/video]
[video=youtube_share;4Of_0ZNGeLA]http://youtu.be/4Of_0ZNGeLA[/video]
Tzed250
Addicted to ArboristSite
I guess you took one for the team Brad. I dont have the guts to cut on a new carb yet. Dull chain or not that 550 was still bustin' through those logs pretty quick! Have you tached yours in the wood? It sounds like it is well up there. I was thinking, a while back the only 50cc saw people wanted to talk about on here was the Dolmar 5100. I know that the 550XP is the flavor of the month, but I really see it turning into chocolate. The go to saw in the 50 category that will re-write the books. Even though you are going to replace the carb, what do you think vs. your 346?
Looks quite strong. Does the carb have a metering needle? if so you could try lowering the pop off pressure by removing one loop off the spring, you have nothing to loose with that carb anyway.
Would you like to try one if these
562? Same connectors I assume? Sure, nothing to lose.
Sometimes you win, sometimes you don't. I risked having to replace the topend on the 261 when I gutted the intake like I did. That risk really paid off well. Someone with more carb experience might be able to bring this carb back. I will definitely try Andre's suggestion.
mweba
Addicted to ArboristSite
555. Didn't get a chance to test compatibility......want to be a Guinea pig...shoot me your addy
I certainly check it out. PM coming.
Hum, this could get interesting, what about the control unit? I will guess that has to be matched with the coil and whatnot.
Mastermind
Work Saw Specialist
Ears perking up.......
mweba
Addicted to ArboristSite
Brad has the micro, if it mounts we may learn something. The software ability really interests me.
I have three.....just say in.
Words can not portray how anxious I am for auto tune tech school.
Mastermind
Work Saw Specialist
In.
I was just wondering if the 555's control unit would sync up with the 550, I doubt. Hopefully the 550's unit can deal with the 555 carb.
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mweba
Addicted to ArboristSite
Cool. Believe I still have a box with your addy.
Mastermind
Work Saw Specialist
You will see details on the results too.
I really enjoy that way we all share results and info. I don't miss the days when the builders were all about cutting each others throats. If Brad hadn't took the plunge on the 261 we would all most likely still be wondering where the gains were in that saw.
mweba
Addicted to ArboristSite
If the the micro mounts, the software sold figure it out....eventually lol. The fuel map is set but the system is all learning. I have seen it compensate some serious air leaks, leading me to believe its range is sufficient.
mweba
Addicted to ArboristSite
Agree 110%. Learned many a trick from the builders here and pass any knowledge I can contribute. Some day I'll learn enough to pick up a grinder thingy
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