Alrashid2 171 #26 Posted November 11 Very very good point... I couldn't find any pinhole leak or anything but who knows, maybe the diaphragm is just loose and leaking around where the rubber connects to the metal in the center. Or the pinhole was so small I'd never find it. I thought about exactly what you were saying when I tried testing the pump a bit ago. Stuck some fuel line on it and dipped both ends into a container of gas. Manually pumped and couldn't see any fuel in the area where it would connect to the crankcase, but again, I pumped it 30 times or so which would only equate to around 1 seconds' worth of pumping at 2400rpm! Here's to hoping this fixes it. Time will tell. Waiting on the pump and some gaskets I'm replacing while I'm in there on the breather and carb... after that, will need to run it for a few hours, and then drain some oil to ensure it doesn't smell like gas anymore. Likewise, when I do the oil change, will take a photo of exactly where the level is on the dipstick, so I can ensure it isn't rising... with all the little leaks on this thing, it should drop if anything!! Share this post Link to post Share on other sites
Alrashid2 171 #27 Posted November 11 Am I safe to assume that the only two locations fuel could be getting into the crankcase are at the Carb entry and the Fuel Pump? 1 Share this post Link to post Share on other sites
Bill D 1,927 #28 Posted November 11 35 minutes ago, Alrashid2 said: Am I safe to assume that the only two locations fuel could be getting into the crankcase are at the Carb entry and the Fuel Pump? Yes. Pump is the most likely culprit. Nearly impossible to flood the carb on that model to the point where it would fill the crankcase with fuel. That's most likely to occur on gravity fed equipment. 2 Share this post Link to post Share on other sites
Alrashid2 171 #29 Posted November 11 1 minute ago, Bill D said: Yes. Pump is the most likely culprit. Nearly impossible to flood the carb on that model to the point where it would fill the crankcase with fuel. That's most likely to occur on gravity fed equipment. Thank you Bill. Makes me hopeful! Will report back in a week or so when all the parts come in Share this post Link to post Share on other sites
Alrashid2 171 #30 Posted November 12 Can I ask you guys a question regarding this? Is it possible that my oil smells like gas simply because I haven't been running the engine much? I bought it a few weeks ago, changed the oil, and have maybe ran it for 2-3 hours total. In that time, the longest single run time was maybe 20 minutes, that's all. I'm wondering if this is the equivalent to running a car in short trips and idling a lot, and never getting up to full operating temperature. Maybe that could cause the oil to smell like gas? Share this post Link to post Share on other sites
wallfish 17,023 #31 Posted November 13 The oil should still smell like oil. It never "got up to temperature" in the container it was in before pouring it into the engine. BUT, could there have been gas in the old oil which could still leave a smell in the new oil? IDK If it lights on fire easily there's a good amount of gas in it. Share this post Link to post Share on other sites
Alrashid2 171 #32 Posted November 13 6 minutes ago, wallfish said: The oil should still smell like oil. It never "got up to temperature" in the container it was in before pouring it into the engine. BUT, could there have been gas in the old oil which could still leave a smell in the new oil? IDK If it lights on fire easily there's a good amount of gas in it. Haha fair enough. I did try lighting the old oil and it wouldn't light, despite smelling like gas badly. I had read about in a modern automobile, lots of short trips could result in gas getting into the oil. Running rich at start up, and gas seeps into the oil past the rings, then never burns off. Wasn't sure if that were true and if it applied here too Share this post Link to post Share on other sites
Alrashid2 171 #33 Posted November 15 Just wanted to share, got my Rotary fuel pump (# 16833) in today. Plastic, yes, but seemed like a much higher quality pump than I saw anywhere else. The Amazon chinesium ones varied but were all obviously junky. Likewise, the Stens one I saw online looked exactly the same. I can snap pictures if anyone wants to see. The Rotary brand one is plastic still but obviously had a much thicker diaphragm/gasket. Metal lever and screws were of nicer quality. Operating the lever to pump manually also felt better. I compared the old off-brand pump and the Rotary and the Rotary brand one pumped more per pump, and felt "stronger" if that makes sense. Installed and seems good to go! Will see if the oil problem has been solved. Only dilemma I ran into is that it came with both a traditional gasket, and a red o-ring like gasket that was smaller. Traditional gasket was the same outline as the entire body, while the red o-ring sat inside. I ended up ditching the o-ring and used the larger gasket. We'll see if she holds. Share this post Link to post Share on other sites
