c-series don 8,724 #1 Posted July 22, 2023 I recently bought a 418 that sat for years. So when I got it home I drained the fuel until the tank was basically bone dry and replaced the fuel line. I put an inline filter in the new line. It then ran okay, not great but okay. Recently it would start and run for about two minutes then die. Not wanting to remove and clean the carburetor, I tried to cheat and just use some Seafoam in the gas. Well that seamed to help but I know I’m going to have to remove and clean the carburetor if I want to to run correctly. Today when I let it run for a while I noticed that the intake manifold was sweating profusely, I mean it was dripping!!! I’ve never seen any of my other tractors do this? Yes today it is warm and humid but again I’ve never seen this before. I have three tractors with the same motor. Can someone please tell me what would cause this?? Also it seems like it’s getting too much fuel and I want to turn the high speed adjustment screw in a bit but there is no screw! Only what appears to be the low speed screw and I turned it all the way in and nothing changed? Could excessive fuel going through the manifold cause the sweating? Share this post Link to post Share on other sites
ebinmaine 67,640 #2 Posted July 22, 2023 5 minutes ago, c-series don said: Could excessive fuel going through the manifold cause the sweating? Don ole boy. Click this: https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=farmall&th=366699 Interesting stuff. Clean the carb. Make sure the M18 heat/cool shrouds are clean too. 1 Share this post Link to post Share on other sites
squonk 41,156 #3 Posted July 22, 2023 2 minutes ago, ebinmaine said: Don ole boy. Click this: https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=farmall&th=366699 Interesting stuff. Clean the carb. Make sure the M18 heat/cool shrouds are clean too. Yup . We used to have to put hot air systems in cars in the old days to keep carbs becoming a block of ice in the winter. 4 Share this post Link to post Share on other sites
ebinmaine 67,640 #4 Posted July 22, 2023 Just now, squonk said: Yup . We used to have to put hot air systems in cars in the old days to keep carbs becoming a block of ice in the winter. I've seen a propane forklift do it. Never a street engine though. 1 Share this post Link to post Share on other sites
stevebo-(Moderator) 8,330 #5 Posted July 22, 2023 It is just junk… I will come get it and pay you 10% more than current scrap 🤷 1 2 Share this post Link to post Share on other sites
ebinmaine 67,640 #6 Posted July 22, 2023 9 minutes ago, stevebo said: It is just junk… I will come get it and pay you 10% more than current scrap 🤷 This is a very fair deal. Once. Again.... The generosity of the members of the site. Absolutely mind boggling to me. 4 Share this post Link to post Share on other sites
c-series don 8,724 #7 Posted July 22, 2023 @ebinmaine that’s interesting stuff! Yes the shrouds are clean. @squonk This engine, as I’m sure you know, has the ability to turn the air cleaner intake to suck warm air off the exhaust manifold for winter operations. It currently is not in that position however. @stevebo Geez, I never thought of it like that? If that’s the case then my 418-C is probably junk too? Maybe you should come get both of them before they are completely worthless and then I have to pay you to take them? 3 Share this post Link to post Share on other sites
wallfish 17,014 #8 Posted July 22, 2023 Just thought this guy's take on it was kinda funny From that thread EB posted. "You say you have never seen that before. The reason you havent seen it is becsuse the hood of your car was shut and you couldnt see the carb." 1 1 Share this post Link to post Share on other sites
buckeyes 213 #9 Posted July 22, 2023 I still see this a lot on the older farm tractors in the area when doing hay in the summer time. It seems the more hot and humid the air temperature, the more likely you are to see the carburetor and intake manifolds sweat. 1 Share this post Link to post Share on other sites
Handy Don 12,237 #10 Posted July 22, 2023 (edited) Carb icing killed a LOT of pilots in the early days of flying machines. By the time the crashes were examined there was no evidence of the icing, so it took quite some time to figure out. It still causes crashes when carb heat isn’t applied when needed. Edited July 22, 2023 by Handy Don Share this post Link to post Share on other sites
squonk 41,156 #11 Posted July 22, 2023 In the hot and humid weather think dew points. With a high DP things will sweat that you wouldn't expect. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,048 #12 Posted July 22, 2023 I remember the 6 cylinder Ford Falcon's back in the day quitting at highway speeds on a 80F day because the carb intake was completely frozen over. 1 Share this post Link to post Share on other sites
