Sportsman 800 Twin / gas in the oil
#1
Sportsman 800 Twin / gas in the oil
Hi all, new to forum. I have an issue with my Sportsman 800 getting fuel into the oil. I'm sure it's fuel and not coolant. I found the oil level about 3/4" higher than normal and it smelled heavily of gas when I drained it. Ran it with fresh oil and it happened again over the course of several rides. I figured it might be a sticking injector so I replaced both with new ones and it did it again. I just replaced the ignition coil and plugs/wires and changed the oil/filter yet again. Throughout the entire issue the bike has ran great and idled smoothly. Compression is 168# on one cylinder and 148# on the other. Any suggestions or advice is appreciated. Right now I am using the quad lightly and keeping a close eye on my oil level.
#2
#4
Manual says between 150 and 200 psi. Getting kinda at minimum on one cylinder but considering the other one,there's just a little over 10% difference between the two. If it's been running good other than gas consumption it may not be anything to worry about yet. Just let Digital Wrench do it's thing and go from there.
#6
Well, I was concerned at the low compression on the one cylinder and the spread on the compression numbers between cylinders was pretty large. I found an old post from a guy that claims to have "un-stuck" hundreds of rings over the years using Marvel Mystery Oil. I figured why not give it a try so here is what I did and the results of the experiment so far:
*changed the oil again and added 20% MMO to the crankcase and ran the quad a couple of days.
*added 2 oz of MMO on top of each piston while the engine was warm (not hot). I let this soak for ~24 hours, removed any excess from the top of the piston and ran the machine. It smoked HEAVILY for a couple of minutes and then cleared up.
Before and After compression numbers:
Cyl 1: 148# to 160# Cyl 2: 168# to 172#
Soak #2: Added another 2 oz of MMO on each piston and let it soak ~24 hrs. Ran the bike - it smoked a little and cleared up quickly.
Before and After compression numbers:
Cyl 1: 160# to 182# Cyl 2: 172# to 181#
Looks promising but I'm not calling it a done deal quite yet, but I am happy about the compression gains. I'm watching my oil level closely and hoping my problem with getting fuel in the oil is fixed. I'm still planning to take the bike to the shop to have the ECM re-flashed as well. This is the first time I've ever used this snake oil but so far I'm pleased with the results. Right now she's got fresh oil/filter and new plugs so we'll see how it goes.
*changed the oil again and added 20% MMO to the crankcase and ran the quad a couple of days.
*added 2 oz of MMO on top of each piston while the engine was warm (not hot). I let this soak for ~24 hours, removed any excess from the top of the piston and ran the machine. It smoked HEAVILY for a couple of minutes and then cleared up.
Before and After compression numbers:
Cyl 1: 148# to 160# Cyl 2: 168# to 172#
Soak #2: Added another 2 oz of MMO on each piston and let it soak ~24 hrs. Ran the bike - it smoked a little and cleared up quickly.
Before and After compression numbers:
Cyl 1: 160# to 182# Cyl 2: 172# to 181#
Looks promising but I'm not calling it a done deal quite yet, but I am happy about the compression gains. I'm watching my oil level closely and hoping my problem with getting fuel in the oil is fixed. I'm still planning to take the bike to the shop to have the ECM re-flashed as well. This is the first time I've ever used this snake oil but so far I'm pleased with the results. Right now she's got fresh oil/filter and new plugs so we'll see how it goes.
#7
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