Pigeontroller Posted May 15, 2012 Report Share Posted May 15, 2012 So I just changed the plugs on my 2005 F90, about 950 hours on it. I noticed the bottom plug (its an in-line 4 cyl) had some oil on the threads, where the other 3 didn't. Then I notice what seems like a wee bit of oil in the plug hole? Opinions? Link to comment Share on other sites More sharing options...
chris.brock Posted May 15, 2012 Report Share Posted May 15, 2012 I'm definately not an expert, but if it doesn't burn much oil, I wouldn't worry about it, it makes sense the lower cylinder might be bathing in oil a little more than the others, and hey, it's a Yamaha, they are typically reliable Link to comment Share on other sites More sharing options...
Dara Posted May 15, 2012 Report Share Posted May 15, 2012 (edited) I know nothing...run it for a while and look again. It could have something to do with sitting all winter Edited May 15, 2012 by Dara Link to comment Share on other sites More sharing options...
Pigeontroller Posted May 15, 2012 Author Report Share Posted May 15, 2012 Sitting all winter? I've been running it since early march! Link to comment Share on other sites More sharing options...
Tybo Posted May 15, 2012 Report Share Posted May 15, 2012 Is the engine crank case losing oil or making oil.making oil is fuel getting into the crank case. Is your oil black and have a smell of fuel. Link to comment Share on other sites More sharing options...
brkygetr Posted May 15, 2012 Report Share Posted May 15, 2012 Also not an expert but the lower cylindar(3) in my 97' 2 stroke 40 has the same issue. Always has and as I understand it always will, as stated above oil falls down to the bottom..I just clean my plug and drain the bowl every now and again...works just fine. Link to comment Share on other sites More sharing options...
NANUK Posted May 15, 2012 Report Share Posted May 15, 2012 How much oil was on that plug ? It's normal for the bottom plug to be a little "wet" and having a bit of carbon compare to the other 3, Like mentioned by others, keep an eye on oil level and NEVER over fill, in fact it is better to keep it slightly lower then the full mark on the dipstick. Link to comment Share on other sites More sharing options...
F7Firecat Posted May 15, 2012 Report Share Posted May 15, 2012 the yammie is junk, scrap it and buy verado! Link to comment Share on other sites More sharing options...
Billy Bob Posted May 15, 2012 Report Share Posted May 15, 2012 Me thinks your fine.....go fishing. Link to comment Share on other sites More sharing options...
bucktail Posted May 15, 2012 Report Share Posted May 15, 2012 Maybe you get a bit of oil from when its tilted full up. I have the exact motor and havnt seen that, but then again I havnt looked. Ill check this week and post it. Darren Link to comment Share on other sites More sharing options...
BITEME Posted May 15, 2012 Report Share Posted May 15, 2012 dont sweat it its all good fish man fish!!!! Biteme Link to comment Share on other sites More sharing options...
Dara Posted May 15, 2012 Report Share Posted May 15, 2012 the yammie is junk, scrap it and buy verado! says the guy with the catscrap Link to comment Share on other sites More sharing options...
Pigeontroller Posted May 16, 2012 Author Report Share Posted May 16, 2012 Thanks for the feedback guys...And Brian, just talked to a very reputable dealer in Hamilton, he won't even sell them Verados cause...Well, he did say the newer ones aren't as bad as the older ones...Bet you a St.Croix LTM my Yammie lives longer? Link to comment Share on other sites More sharing options...
F7Firecat Posted May 16, 2012 Report Share Posted May 16, 2012 LOL guess we will see........... Link to comment Share on other sites More sharing options...
irishfield Posted May 16, 2012 Report Share Posted May 16, 2012 LOL guess we will see........... Going into season 6 with my 275.. never a hickup ! Link to comment Share on other sites More sharing options...
chris.brock Posted May 17, 2012 Report Share Posted May 17, 2012 (edited) Yamaha's the best to heck with the rest! 2 sleds, 2 outboards and 1 really geeky Yamaha scooter, I'm happy with them all Edited May 17, 2012 by aplumma no mock cussing please Link to comment Share on other sites More sharing options...
F7Firecat Posted May 17, 2012 Report Share Posted May 17, 2012 Yamaha's the best to heck with the rest! 2 sleds, 2 outboards and 1 really geeky Yamaha scooter, I'm happy with them all How many times have you had to weld the the skid and replace the sliders on that yammie? Link to comment Share on other sites More sharing options...
workwear Posted May 17, 2012 Report Share Posted May 17, 2012 hey firecat...what are ya 12 yrs old?? Link to comment Share on other sites More sharing options...
ecmilley Posted May 18, 2012 Report Share Posted May 18, 2012 for the op- if your seeing oil on a sparkplug threadds and the spark plug itself depending on the design of the engine it could be spark plug tube seals no biggie but havn't been under the cowl of a yam for several years if you fire a pic up of the spark plug area may get a better idea Link to comment Share on other sites More sharing options...
ecmilley Posted May 18, 2012 Report Share Posted May 18, 2012 How many times have you had to weld the the skid and replace the sliders on that yammie? now now i replace sliders in my yammy about as often as you replace pistons and rings in the fireball. only welded my skid once in 13000 km of ditchbanging and trail riding not the strongest skid i know but rides nice Link to comment Share on other sites More sharing options...
F7Firecat Posted May 18, 2012 Report Share Posted May 18, 2012 just a little bit of razzin workwear, how old are you or shall i guess? Link to comment Share on other sites More sharing options...
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