Terry Harper 1 Posted September 13 Share Posted September 13 At the museum we have a Red Diamond in one of our pieces of equipment. Its not the original engine but a re-power performed decades ago when the chassis got separated from its original engine. A year ago we performed a tune-up - new plugs, cap, points, condenser, wires, coil etc. and it was purring like a kitten. This winter it started miss behaving - dropping a cylinder or two. When we pulled the plugs they are fouled. We ran a compression test and all is spot on. We again gave it a tune-up. It ran great for a less than an hour and fouled up again. Last time we ran it it was popping and missing. I am thinking too lean? Its also always the same plugs fouling 4, 5 & 6 Its running a Holley 2140-G carb. It seems like a carb issue ? Am I barking up the wrong tree?? Thanks! terry Here is the beast its in. The original engine was a massive six cylinder Wisconsin D4 (1,013 cid) If you know where we can find one of those ...............😁 When they re-powered it back in the 1970's they installed a auxiliary transmission in front of the original unit which is a massive 3 speed made by Cotta. We run the auxiliary locked in 2nd. Note the funky exhaust pipe. It was installed that way so the original exhaust cut-out in the hood could be used. That Red Diamond is a little lost in there but it moves it along just fine. And the original engine. 1 Quote Link to post Share on other sites
rustred 142 Posted September 13 Share Posted September 13 what is the compression? that is important to post. might have intake leak. Quote Link to post Share on other sites
Weapon 140 Posted September 13 Share Posted September 13 Just a thought but you may want to install hotter spark plugs to help with the fouling especially if it’s lightly used and not run under a decent load. John Quote Link to post Share on other sites
Terry Harper 1 Posted September 13 Author Share Posted September 13 If I remember correctly compression was around 130 but I would have to check. In regards to hotter plugs it does seem to clear-up and run better when it working - problem is that's not often. Quote Link to post Share on other sites
snoshoe 300 Posted September 14 Share Posted September 14 Is there anything vacuum plugged into that manifold that could be leaking at the other end. Quote Link to post Share on other sites
supermechanic 39 Posted October 10 Share Posted October 10 I viewed one of those in person at Churchill Dam, on the Allagash River in Maine, maybe 45 years ago. I believe that one was fitted with skis, rather than wheels in front. The engine was the original, a huge beast. The tractor may still be there, Google earth shows a pavillion structure at the site, maybe it is under cover. Quote Link to post Share on other sites
R Pope 273 Posted October 10 Share Posted October 10 That's a Lombard logging tractor, about a 1932 or so. Quote Link to post Share on other sites
supermechanic 39 Posted October 11 Share Posted October 11 To which one are you referring? Quote Link to post Share on other sites
mmi 306 Posted October 11 Share Posted October 11 champion plugs..... go 2 hotter and swap to another brand ,then use only fresh non ethanol or av fuel if you can get it engine was designed to run on real gas not water goo Quote Link to post Share on other sites
R190 149 Posted October 12 Share Posted October 12 Its every other cylinder in the firing order maybe a bad condenser? Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.