352LikesNOVAROSSI Engine thread....
05-16-2013 | 02:39 PM
#5567
Tech Adept
Joined: Mar 2013
Posts: 180
From: Montreal
Ahh I was turning 1-2 or 3 hours at a time...Way too much I guess.
Thanks I did not know these carbs were so sensitive.
Thanks I did not know these carbs were so sensitive.
I could be off but I think you have your tuning lingo is wrong. One hour means 1/12th of a turn. Basically 5 minutes if you want to get techinical. One hour is not one full turn. You should be making adjustments 1/12th of a turn at a time. I usually do a blade with of the screwdriver at a time, if you are far off this will take for ever though. A p5 should run up to 260 with no real issues. I don't even use a temp gun anymore, I just lean it until it starts to make good power and don't go much further. The more you do it the more you'll get a feel for it. The engine should clear out nice and sing down the straight. If you like the way it runs at 240 you are well within the range of safe.
05-17-2013 | 04:26 AM
#5569
I'm around the 3/4 gallon mark on my beat B4 (based on the 21-4), and it runs about the same when I've temped it. If I go an hour richer it bogs like hell, so I can agree they run a bit warm, but it's a happy as a pig in its own muck.
05-17-2013 | 08:49 AM
#5570
Tech Initiate
Joined: Mar 2013
Posts: 21
From: Rock Island IL
Backwoods engine fix
My P5 was toast after a re pinch it lasted 1 gallon the guy that did it did not polish the piston and sleeve so the scratches on the back side of the piston were still there only making the problem worse. So until I get a new motor I have taken the sleeve and wet sanded .003 off of the top of the sleeve then put it back together. Instant compression it runs now hopefully it will get me through the weekend that's all I'm asking of it. Then I will buy a new motor.
05-17-2013 | 01:30 PM
#5572
My P5 was toast after a re pinch it lasted 1 gallon the guy that did it did not polish the piston and sleeve so the scratches on the back side of the piston were still there only making the problem worse. So until I get a new motor I have taken the sleeve and wet sanded .003 off of the top of the sleeve then put it back together. Instant compression it runs now hopefully it will get me through the weekend that's all I'm asking of it. Then I will buy a new motor.
05-19-2013 | 03:55 PM
#5577
My needles just above flush but wasn't getting the top end zip
I was looking for I mite try a hotter plug ?? Cheers
05-20-2013 | 11:37 AM
#5580
rear bearings can be damaged by poor quality fuel....rapid RPM spikes while engine is cold...improper breakin of the bearing.......Over revving the engine..... running too lean.......