Rich or Lean?

MBellRacing · Post by **MBellRacing** » Tue May 18, 2010 6:43 pm

Loudo wrote:I'd check the jet needle height setting before I started messing around with jets, but that's just me. It wouldn't take much effort to move the clips down (and needle up) and see what happens.

So what would make it richer as far as jet height? What height should it be at?

Loudo · Post by **Loudo** » Tue May 18, 2010 7:05 pm

Well, it needs to be at whatever height causes the engine to run optimally which varies according to that engine's unique...qualities? If you think it's running lean, raising the jet needles will richen. You raise the needles by placing the clips lower.

Maybe one more look at your jets is in order just to be sure some debris hasn't made its way in there. What with using our old gas tanks and so forth associated with getting machines running that have been dormant, sometimes it takes a while for all the loose stuff to flush through and end up on your screens...or not. One more pass through through the fuel supply chain might be warranted. Sometimes we think new parts is the key when it's something simpler.

MBellRacing · Post by **MBellRacing** » Tue May 18, 2010 8:06 pm

Loudo wrote:Well, it needs to be at whatever height causes the engine to run optimally which varies according to that engine's unique...qualities? If you think it's running lean, raising the jet needles will richen. You raise the needles by placing the clips lower.

Maybe one more look at your jets is in order just to be sure some debris hasn't made its way in there. What with using our old gas tanks and so forth associated with getting machines running that have been dormant, sometimes it takes a while for all the loose stuff to flush through and end up on your screens...or not. One more pass through through the fuel supply chain might be warranted. Sometimes we think new parts is the key when it's something simpler.

Did, and done. Could a clogged pilot jet be the culprit? It is 100% clogged in the right side carb, which is the side I thought sounded worse. It looks REALLY clogged but I also found a LOT of crap floating around in my fuel system. I'll put it back together tonight and see if it needs further work.

LOUD MOUSE · Post by **LOUD MOUSE** » Tue May 18, 2010 8:31 pm

I'm a bit perplexed as I would have expected ya had checked and cleaned any/all parts of the fuel system.
Main Jet #135
Slow #42 Clip second slot from the bottom. (pointed end)
OH ME!. ....................lm

MBellRacing wrote:
Loudo wrote:Well, it needs to be at whatever height causes the engine to run optimally which varies according to that engine's unique...qualities? If you think it's running lean, raising the jet needles will richen. You raise the needles by placing the clips lower.

Maybe one more look at your jets is in order just to be sure some debris hasn't made its way in there. What with using our old gas tanks and so forth associated with getting machines running that have been dormant, sometimes it takes a while for all the loose stuff to flush through and end up on your screens...or not. One more pass through through the fuel supply chain might be warranted. Sometimes we think new parts is the key when it's something simpler.
Did, and done. Could a clogged pilot jet be the culprit? It is 100% clogged in the right side carb, which is the side I thought sounded worse. It looks REALLY clogged but I also found a LOT of crap floating around in my fuel system. I'll put it back together tonight and see if it needs further work.

MBellRacing · Post by **MBellRacing** » Tue May 18, 2010 9:18 pm

Oh you!... Lol. I forgot to mention that I cleaned everything up to the jets. I had to run out to dinner quick and forgot to check the number on the jet. I'll check and see where I'm at. Could a clogged pilot jet cause that much of a dramatic issue?

LOUD MOUSE · Post by **LOUD MOUSE** » Tue May 18, 2010 9:19 pm

Yep as it won't allow that side to idle. ....................lm

MBellRacing wrote:Oh you!... Lol. I forgot to mention that I cleaned everything up to the jets. I had to run out to dinner quick and forgot to check the number on the jet. I'll check and see where I'm at. Could a clogged pilot jet cause that much of a dramatic issue?

MBellRacing · Post by **MBellRacing** » Tue May 18, 2010 10:51 pm

So the main jets are 145's but the needle is in the bottom location. I think I'll keep these jets (since it was lean to begin with) and just raise the needle... wise?

I broke one of the little clips that adjust the needle height-- I'm using a ridiculous tool for the job and it proved to be a bad choice... does anybody know where I can get another one of these? I'd prefer to go pick one up than order one.