yamaha cv25 hp long( discolouration mark)

[fwwardpl]

my tinnie motor has this mark about half way up the leg from the cav plate, is this caused by exhaust and should the exhaust be replaced ,or ist all ok??

[Big_Kev]

If it is whitish looking discolouration I woudn't be concerned they all do that. It seems to show up well on the dark grey.
I have had a few Yammies and they where the same.
The Merc I had didn't do it but that was about the only thing it did right.
Cheers Kev.

[Sandbar]

I had the same problem with my 30.Try spraying with wd40 or rp7 and give it a good rub.

[Sandbar]

I had the same problem with my 30.Try spraying with wd40 or rp7 and give it a good rub.

[clutter]

I have the same problem on my 40 4-stroke. Must be something in the paint. I've been told CLR will help get rid of it. Looks like a bit of oxidation of some sort.

Cheers, Clutter

[aido]

next time you run the engine at home on the muffs,
have a feel around that area, might be heat related.

[bigbrian47]

I posted a while back mate with a suzuki 20 years ago had same problem otherwise good motor, seems to be peculiar to the japanese motors.time @ usage is the test for all motors
cheers brian