Where could one get rebuilt Yamaha OEM rebuilt engines?

[David Pierce]

I have a 2006 Yamaha SX230 HO. I wanted to trade it in on a new 2022. The dealer checked it and said one cylinder had low compression and it was likely the entire engine would fail. They said my real option was a new OWM engine. They also said that SBT engines were not good and would no even put one in. Two Questions. Q1: Why does the entire engine fail because of low compression? Q2: Is there anyplace that sells rebuilt OEM engines? Otherwise the boat is in great shape. I just can’t imagine my only options are spend $10k or scrap the boat. Any info would be great. Thanks!

 

[jocolo21]

BS, get a mechanic to replace/ resleeve the cylinder,

 

[WREKS]

Selling it here, may be a better option.

 

[Beachbummer]

If you didn't know you had low compression...do you really?

Verify that by yourself first, before taking their word for it.

Also, Low compression could be caused by a valve issue and you might just need a valve job that could be handled locally by a machine shop.

More diagnostic needed.

 

[Ronnie]

I had the same boat, if both engines spin up to 10,200 rpm you don’t have low compression. I think Your dealer is bullshitting you into trading it in on the cheap.

 

[David Pierce]

Thanks everyone for the great info. I thought it would not be as bad as they say.

 

[David Pierce]

BS, get a mechanic to replace/ resleeve the cylinder,

That sounds like a more logical thing to be done.

 

[David Pierce]

If you didn't know you had low compression...do you really?

Verify that by yourself first, before taking their word for it.

Also, Low compression could be caused by a valve issue and you might just need a valve job that could be handled locally by a machine shop.

More diagnostic needed.

that sounds more logical. Thanks!!

 

[David Pierce]

I had the same boat, if both engines spin up to 10,200 rpm you don’t have low compression. I think Your dealer is bullshitting you into trading it in on the cheap.

Yes, both engines run great and can go up to 10000 rpm.

 

[David Pierce]

Yes, both engines run great and can go up to 10000 rpm.

Thanks for the input!!

 

[Ronnie]

Yes, both engines run great and can go up to 10000 rpm.

Sounds like your engines are running fine. What does the boat top out at? Should be 50 mph +|- 2 mph, at or around sea level, 1/2 loaded (people/fuel/gear).

 

[Ronnie]

Selling it here, may be a better option.

If you go this route or sell it elsewhere online, I suggest you conduct a compression test and post the results. The more information you provide the better/fewer questions you will have to field.

 

[David Pierce]

Sounds like your engines are running fine. What does the boat top out at? Should be 50 mph +|- 2 mph, at or around sea level, 1/2 loaded (people/fuel/gear).

It can do about that. Also, how do you know Just come out like oh fault your faultJust come out like oh ceasing your fault when I posted a thing on jet boat… No no noI hardly ever run it at full throttle so I never stress the engines. Thanks for the input.

 

[Cobra Jet Steering LLC]

I would do a leak down test and see if I can hear where the compression is leaking MY guess would be a bad head gasket near the exhaust side or a slightly bent valve, , when people rev their engines out of the water all it takes is one valve to hang and it can get bent also I would look at the actual compression level is it bad or just a slight difference. the m r 1 engines are usually pretty strong although the number 2 plug likes to break off when being changed and if that is the cylinder perhaps someone had that happen and some debris got stuck in the rings I have seen head gaskets go bad and water jackets corrode and leak at the exhaust manifold so I would have it checked by someone who has no dog in the hunt.

 

[Ronnie]

It can do about that.

Also, how do you know Just come out like oh fault your faultJust come out like oh ceasing your fault when I posted a thing on jet boat… No no noI hardly ever run it at full throttle so I never stress the engines.

Thanks for the input.

Again sounds like your engines are running fine.

I do not understand the rest of your response above so I am not responding to it.

 

[David Pierce]

Again sounds like your engines are running fine.

I do not understand the rest of your response above so I am not responding to it.

Oh sorry! I don’t know what that is . Lol very strange??

 

[David Pierce]

I would do a leak down test and see if I can hear where the compression is leaking MY guess would be a bad head gasket near the exhaust side or a slightly bent valve, , when people rev their engines out of the water all it takes is one valve to hang and it can get bent also I would look at the actual compression level is it bad or just a slight difference. the m r 1 engines are usually pretty strong although the number 2 plug likes to break off when being changed and if that is the cylinder perhaps someone had that happen and some debris got stuck in the rings I have seen head gaskets go bad and water jackets corrode and leak at the exhaust manifold so I would have it checked by someone who has no dog in the hunt.

Great info! Thanks so much.