My 15 year old yamaha 25hp 4 stroke was running cruddy. I took it into the shop and got the bad news today. $450.00 if I want it to fix so it will run good. $275.00 IT may idle ruff when their dunn. $1900.00 for a total rebuild. They say it is noisy and that the crank and bearings are probably starting to go out. I have had great luck with this engine at has over 1500 hours on it. Some of them pretty hard. I cant make up my mind buy new or fix the thing. It aint worth rebuilding. But it is a roll of dice how long it will last if I have them fix it.

I'd buy a new one. I've heard that 1500hrs is the point where most outboards are finished. My brother bought a 30hp demo-model Yamaha over the summer. It had 5 hrs on it,with full factory warranty for $2300. A brand new one is more,but $1900 will put a good dent in the new motors cost.

Wow! For that much money I would try giving it a tune up first. New plugs, oil, oil filter, fuel filter, and gear oil. Then, if it is still running crappy you may just want to buy a new one.

Time to up grade.Good luck,
STRIKE ZONE

What did they say was exactly wrong with it? the reason i ask my neighbor has a 9.9 thats got some years it started running bad, hard starting running rough and then finally wouldn't stare, come to find out all it was, was the kill switch harness was shorting out, the crank shaft bearings are probably bad? and they are probably good to have them pin it down, there not a whole lot that go wrong with those motors, just my .02 worth Doug

to me that does not sound like good mechanical advice.this much to make it run.but it may run bad?crank and bearings are probably bad?i would take it for a second opinion.good luck.scott

They recomended rebuilding both carbs, tuneup, and sync the carbs, Clean compresion valves. I was told the compresion valves release extra compression when the engine is idleing and makes it run smoother at idle . I was told they plug up with carbon and stop working. I just called my boat guy he told me he has a 2002 merc 2 stroke new I can pickup for $2000.00 plus tax . I am thinking bout making a trip their this weekend.

Have you looked at "newer" used motors? $2K should get you a long way towards something newer.

If you do have some work done on it, I would skip the rebuild and have them do the carb work and possibly clean out he carbon. When I rebuilt the carb on my Yamaha kicker the before and after difference was night and day. According to my mechanic the most common problem with the Yamahas is fouled carberators due to the pinhole sized orifices inside.
JMS

troller, send me your email,,,

Troller, whatn type of boat are you putting this on, better yet are you looking for a short or long shaft?

Its going on my inflatable achiles. THe boat is rated for 40 hp but once you do that the motors go to 3 cyl and the weight goes up. So a short shaft tiller is what I need.

Go to 3riversmarine.com ,they have some killer deals eince they are a new Yami dealer.

Try the local Voc. school small engine repair.