New noise / Honda 225 with video

[musella]

Hi
I have twin 2006 Honda 225s.. about 850 hours on them..They both sounded the same until yesterday. Starboard engine developed a knocking or ticking noise. Hard to describe so I posted a video of it on my website. Look at
Video clip of engines
there are 3 short video clips.. the engine with the noise at idle, the second video is the same engine revved up a little, and for comparison the third video is the other engine without that noise.

I am not sure if I hit something - there is a lot of junk in the water still from hurricane Sandy and I made a 40 miles trip yesterday. It has full power, starts easily. My last fill up of gas was about 3 weeks ago. I went through about 100 gallons since then (tanks are 1/2 full.. separate tank for each engine)

Any ideas what it could be and how expensive a problem this is?

thanks
Al

 

[musella]

Re: New noise / Honda 225 with video

Can anyone at least hear the noise? How would you describe it?

 

[IllesheimVet]

Re: New noise / Honda 225 with video

Can you tell if the sound seems to be coming from the mid-section? If you have a long shaft engine, has the mid-shaft bushing ever been replaced? They have been known to ruin the driveshaft and make a hole in the lower unit housing.

 

[musella]

Re: New noise / Honda 225 with video

It is hard to tell where it is coming from. The mid shaft bushings have not been replaced but the entire lower unit was replaced last year. Would these bushings make noise even in neutral?

 

[IllesheimVet]

Re: New noise / Honda 225 with video

Yes, they would make noise if that were the problem since the driveshaft rotates (driving the water pump) even in neutral. When lower unit is removed the bushing can be seen in the mid-section, a rubber bushing around a bronze(?) bearing held in by a washer and internal circlip. The housing this thing sits in is "C" shaped which allows the rubber to migrate into the opening of the "C" putting pressure on the bushing and causing wear to the driveshaft. This is water lubricated and is the most poorly designed part I have seen on the 225. Marineengine dot com has several older threads on this problem. If you boat in shallow or silty water, this water is what will lubricate and cause scoring of this bushing and the driveshaft. I replaced mine @ around 275 hours and my shaft still had minor scoring where the shaft contacts the bushing. Not saying this is your particular problem, but is a possibility.