bad smoke, white when driving.

[MARKMC7]

OK all, I went out and started the ole girl this afternoon, let her air up then proceeded to take her for a drive. while I was in 1st gear she went really smooth then what seemed to be nothing but a white cloud was when I started onto the main drag here in town. upon acceleration there was so much white smoke the people behind me became non visible Thur every gear until i was doing 45 and 4Th gear. she continued to do this  only less and less as I went thru town. once the engine temp gage read 180 there was no smoke at all from then on. it is an 8v71 that generally smokes on start up then clears. this was the first time i have driven it since i got it home 3 weeks ago, and it had warmed a good hour before i drove it back then as the guy I got it from was going over everything with me as she idled. also can someone tell me when and when not to run the fast idle??? thanks and see ya in Arcadia with my tin tent MC7.
Mark

[Busted Knuckle]

Mark that is pretty typical of an old 2 stroke! The smoke is from "loading up" during idle and once you get'r out and opened up it clears out and goes away!
Fast idle should be used ANYTIME it is idling! These ol' girls don't like to be idled, fast idle is better but slamming your hand in the door and taking it out on the throttle is best!
  BK 

[Dave5Cs]

Mark

Sounds like it was sitting awhile or running without bringing it up to temp. Raw fuel burning off. I take it ut every so often and run it up to temp and really run it hard they it. It burns all the fuel  sitting in there off.

I use the high ideal any time it is going to be a few minutes. I turn it on after I start it up and wait for the air to come up. Then  when it gets to 120Lbs and blows off.  We release the Emergency brake it will automatically drop down to regular ideal. If I need to ideal waiting for someone to get on or parked with motor running I will flip it on. They don't like to just regular Ideal and it isn't good for them.

Those who don't have a high ideal switch will throttle the pedal up to high ideal if they have a Tach. I have even seen some that make a hold down for the pedal.

Dave

[Dave5Cs]

Sorry;

BK must of been typing while you were. I bow to your knowledge of many more years.

Dave

[Ace]

The big surprise yet to come is when you let it idle for long periods and then when you slightly accelerate, it holds itself wide open and out of control. It will do that until all unburnt fuel is gone. Happened to me and scared the hell right out of me.

[MARKMC7]

thank you all, I suspected this was the case. however knowing all the knowledge out here I was safe to get confirmation. I feel bad for the guy that jumped into the left lane as soon as I compleated the turn because I know he couldn't see a thing as I buried him in that cloud of white smoke. but then that will teach him to be in such a hurry LOL. thanks again all, see ya in Arcadia.
Mark

[Busted Knuckle]

Hey Mark a good dose of raw diesel smoke does wonders at edjimakting people like that! He probably gave you a single finger salute too! No biggie, just a good learning experience for both of ya!
  BK 

[MARKMC7]

My bet is he was to scared to take his hands off the wheel to do the single finger salute. LOL I tell ya i could not see him thru that white cloud till he was in front of it.

[ruthi]

Ha, that is funny Mark. We have received many people telling us we are number 1 over the years, lol.

[Jriddle]

  Mark

YOU probably are number one.
I had the same experience as you went down the block and couldn't see behind at all. I was lucky I was able to slip out of town and run it up with knownone around . It took a long time to clear up I had the most smoke when I had my foot in it. Now I have some smoke on start up and on heavy acceleration. If I do a good preheat not as much smoke.

John

[MARKMC7]

thank you john, I think the block heater will be used and a bit more warm up time before I hit the road for Arcadia. altho I don't mind being number one < insert EVIL GRIN > i know we have smileys but none look evil LOL
Mark

[Jriddle]

I was able to do 1900 miles this summer across Wy and MT. I found the 6V92 turbo ran better the farther I went. I would suspect that weekend bus nuts will have the most trouble with this smoke problem. We aren't able to get the miles behind our two strokes to have them run properly. My thoughts.

John

[robertglines1]

how far did you drive it from PO?  when was it last fueled? what kind of oil does it have in it?  Just a few Questions that could cause problems like you are describing. Or have some bearing on it.  Your going to the rite place Arcadia and sure you will get the answers there. It is good it clears up and might be something as simple as the air box drain ck valves dirty . they should drip at idle and close up around 900 rpm:this lets unwanted oil or condensation that has accumulated in air box escape if clogged the only way out is Thur intake ports to cyl. then it is burned till gone=cleared up smoke.  Ask guys there.  Bob

[Iceni John]

It is good it clears up and might be something as simple as the air box drain ck valves dirty . they should drip at idle and close up around 900 rpm:this lets unwanted oil or condensation that has accumulated in air box escape if clogged the only way out is Thur intake ports to cyl. then it is burned till gone=cleared up smoke.

Just coincidentally, yesterday when I started my bus for the first time in way too long I saw lots of water coming out the slobber tubes.   After I checked it wasn't coolant, I drove around the block a few times until it stopped;  at one point the engine spluttered and produced lots of white smoke (or steam?), but it ran OK after that.   I then drove along Pacific Coast Highway about 30 miles to get everything nicely warmed up;  everything seems OK now.   I guess the recent heavy rains may have been a reason for this condensation water inside the airbox

Yes, I know, I need to exercise the bus more often.
John, shivering because it's only about 60 F here today . . .