98 Yamaha 225 EFI, Ticking?

[magnottiprod]

I have a 98 225 EFI yamaha in great shape bought it used three years ago. A few weeks ago I noticed a strange ticking noise? Today I was doing some gen maintenance , To my disbelief the noise was very pronounced with the cover off. I think its coming from the # 4 cylinder area. Could this be a Piston Pin???? as my heart droped to the floor....Its a lite ticking , def not a rod bearing sound.The motor still runs good except for the normal rough low rpm stuff.<br />help!!!!!!!

 

[bigbrownbuku]

Re: 98 Yamaha 225 EFI, Ticking?

i have seen a lot of gudgeon trouble in motors used for skiing/towing. lately though they have been around the 95/96 model years. just coincidence though, take it to your yamaha mechanic and ask their advice. <br />a way to check your self....<br />take all your plugs out, get a piece of dowel that will fit in the plug hole. rotate each piston over top dead center to about half way down, then push on the piston top with the dowel, you shouldnt feel any movement. if you feel the piston push down slightly test it a few times to be sure. if it is this problem and you catch it now you wont have to replace much more then pistons and bearings. good luck.

 

[rodbolt]

Re: 98 Yamaha 225 EFI, Ticking?

hello<br /> the 02 sensor draw tube has a tendancy to clog and will start moving in the holder creating a distint clacking sound. when was the last o2 sensor maint? <br /> good luck and keep posting.<br /> ps when inspecting the draw tube look for shiney ends that indicate movement

 

[magnottiprod]

Re: 98 Yamaha 225 EFI, Ticking?

Thanks for thr tips. Never did a o2 sensor maint. Did not even know it had one? Where is she located. <br />Could not find it in the shop manual? Is it poss to get the crank cover off with out separating the power head

 

[magnottiprod]

Re: 98 Yamaha 225 EFI, Ticking?

Ok Found o2 senor in the manual but did not say anything about how to service?

 

[magnottiprod]

Re: 98 Yamaha 225 EFI, Ticking?

Hey Rodbolt ! You are the man! That is what is was. the o2 sensor rod was totaly pluged up. The motor has never run so smooth at low rpm. I did check the pistons for movement with a dowl came up good. Did a comp test all cyl 120lbs.<br /><br />Thank you , thank you !

 

[rodbolt]

Re: 98 Yamaha 225 EFI, Ticking?

hello<br /> you need to clean it every 75 to 100 hours or once per year. good luck and keep posting

 

[magnottiprod]

Re: 98 Yamaha 225 EFI, Ticking?

I cleaned the 02 sensor rod but it still was clicking intermittent. So I bought a new one it was little diferant the parts man siad this is what it called for ? Put that one in was good for a few outtings now it s clicking again ? not sure were to go from here?????