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Old 11-27-2006, 10:03 AM   #1
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Default Question for you engine guys..

HI,
I have a Novarossi P5 that has about three gallons through it.
Still has tons of compression left in it as well.
Anyway, since the weather has changed it seems like I havent been able to find that right tune I am looking for.
I put the needles back to stock settings and decided to start over. Anyway,
I ran this weekend and was trying to get it tuned.
Here is the problem. I pulled it off the track at 245 degrees and when I rev it up it spits fuel... I dont get it..
It does seem like my bottom end is fat but I am affraid to lean it out because it is running warm already. At the same time if I lean out the top it is going to make me 275 +... Any advice would be much appreciated..
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Old 11-27-2006, 05:16 PM   #2
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Ant bubbles in the fuel line? you may have bearing leaking.
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Old 11-27-2006, 05:19 PM   #3
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Yes, small bubbles..
How do I know if there is a bearing leaking?
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Old 11-27-2006, 05:24 PM   #4
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If the front bearing is leaking you will have bubbles in the line but you should also have a heavy build up around the flywheel. Buildup as in dirt from all the oil leaking and attracting dirt.
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Old 11-28-2006, 07:37 AM   #5
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Disassemble the engine and just put the crank back in. Holding the enging on an angle with the crank threads down run a little marvel mystery oil in the carb inlet on the case. Now grab the crank threads and turn it a little. If your hand becomes saturated with the mystery oil or you can see oil running out around the shaft and seal, the front bearing is bad. They all tend to lead a little but I have seen them so bad you could see daylight when looking through the crankcase. Make sure to seal it all up when you put it back together.
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Old 11-28-2006, 07:41 AM   #6
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Quote:
Originally Posted by Hrdluck13
HI,
I have a Novarossi P5 that has about three gallons through it.
Still has tons of compression left in it as well.
Anyway, since the weather has changed it seems like I havent been able to find that right tune I am looking for.
I put the needles back to stock settings and decided to start over. Anyway,
I ran this weekend and was trying to get it tuned.
Here is the problem. I pulled it off the track at 245 degrees and when I rev it up it spits fuel... I dont get it..
It does seem like my bottom end is fat but I am affraid to lean it out because it is running warm already. At the same time if I lean out the top it is going to make me 275 +... Any advice would be much appreciated..
In normal situation it is pretty normal (in case if everything in your engine is fine) when weather changed you have tune head shimming.
If you will describe how your weather changed-warmer, colder, higher humudity or lower, etc, I might be able to give you some guidlines what to do.
Edward
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Old 11-28-2006, 09:58 AM   #7
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Edward,
It went from being 70's and 80's (last time it was tuned) to 50-high 40"s
The weather temperature..
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Old 11-28-2006, 10:05 AM   #8
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I say lean out the bottom end some to take care rich bottom end and richen the topend some to compensate temp wise. When you lean the bottom end you should always plan on richening the top some. The weather change usually makes these two stroke engines go out of tune.
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Old 12-11-2006, 01:28 PM   #9
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Thanks for the reply's everyone..
I seem to have it pretty close to tune now..
The only issue I am having is
I will punch it off the line or Blurp it (blurp..blurp..blurp) on the trigger and
it seems to kinds bog... Like it is starving or something..
Doesnt die, but looses all power for a second or two. My temps are low 180 degrees.. Is my bottom to lean?
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Old 12-11-2006, 06:00 PM   #10
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not neccesarily, you may need to richen it. It may be starving for fuel so I would richen it first by 1 hour. If it helps good enough or if it gets worse go back to where you were but 1 hour on the lean side.
Were the bearings leaking? or what did you do to it to correct it?
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Old 12-11-2006, 06:03 PM   #11
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I pulled the flywheel and it is pretty clean..
Nothing unusual I should say..
Someone said to put all the needles flush and
start re-tuning..
Is that what you do on a P-5x?
Are they all suppose to be flush?
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