I4 yamaha 200hp O/B
 

Hello, anybody here running or know somebody running the new inline 4cyl yamaha 200 hp?

Go to the Maverick Boat Co. forum, there are quite a few discussions that pop up on this subject, not too many positives on this engine. Seems it runs like a dog. Personally I do not know anyone that has this engine. However I'm positive you do not want to tie it up to a eTec 200 HO like in their commercials, the HO will drag it all over the place.

Specs out exactly the same as the 175 hp. Considering the 10% fudge factor manufactures are allowed to vary off the listed HP it is likely less than 200 hp. I'm sure it is a wonderfull motor but I was dissapointed when I paided extra for a new Yamaha 225 4 stroke over a 200 and found out both were identical motors putting out identical HP of 206...... the only difference was the sticker and the dealer acknowledged it after the fact. Probably great for a 20 MA but I wouldn't put it on a 23 as a single.

I believe they are also "throw away" motors, i.e., the way they got the weight down was to eliminate the cast iron sleeves and coat the aluminum block. That works ok, as Porsche, BMW and Mercury have been doing it for years. However if you get into a fuel starvation situation (air leak or fuel line/injector restriction, etc.) that leans out a cylinder that overheats a piston and scuffs cylinder, it's probably non-repairable, i.e. you can't just bore/hone and replace piston as you would if there was a cylinder liner. All you have to do is replace the powerhead!

Considering the cost of these new motors, giving up repairability to save a few pounds IMHO doesn't sound like a good tradeoff from a risk/benefit standpoint! If your application is a 20 that was designed for a ~300 lb motor, it'll ride and handle better with a lighter DI 2-stroke or a smaller and lighter 4-S.

I pretty much think they are all "thow away" powerheads anymore, 2 smoker or 4 stroke I don't see too much rebuilding of what is out there now. But again, the cause of such leaning are usually caught by the ECU before it becomes an issue making such problems a thing of the past.

OLE had the 200 on the back of the new build ...

unless you put a window in the block uschrome can fix them.