Are All 2004 225 4 strokes corroded?

[wkendwarrior]

I'm flying down to FL tomorrow morning to at a 26 CC with twin 2004 225 4 strokes. They have 1700 hours on them, maintenance records for all the hours.
I know to have the lower units pulled and look for the corrosion, compression check on all 12 cylinders , computer scan of the type of hours run.
But are ALL 2004 Yamaha 225's corroded???

Great Forum!

Thanks,

[HMBJack]

From my readings on this the answer to your question is no, not all are corroded. In fact, it may be well less than 5% of them out there. Others here can comment.

The corrosion typically shows in the first 700 hours (but there are exceptions). It often first appears as a low idle overheat. Still, it's a "Buyer Beware" scenario with anything purchased used. Have the engines inspected as best you can before purchase.

[capnkingfish]

I can't confirm or deny the overall percentage of engines affected by corrosion issues, but both of my '03 TXRB's have it. Dropping the lower unit to look up the leg reveals damage to the exhaust manifold / muffler, but removing the powerhead will reveal the true amount of corrosion that may be present. My oil pan was toast. Luckily the corrosion did not extend into the powerhead itself. My recommendation would be to find out if the repair kits have been installed. If they have, happy boating. If not, you may consider a $3000 allowance (for each engine) to have it done.

[rodbolt17]

most suffered from it.
how bad it is will need an inspection with a bore scope.
cannot see it with a simple flash light.

kit is about 700 dollars each and it takes about 8 hours per engine.

[pstephens46]

So about $3000 for both engines?

[rodbolt17]

last 3 I did came out at about 3200 a pair.
gotta have oil and such.
some times the bolts for the motor mounts are to corroded for reuse.

[capnkingfish]

My local dealer gave me a rough estimate of 3k per engine. I'm sure that can vary from shop to shop. If you're a DIY person, the cost is around $1100 (this includes replacing the oil pump and other parts that may need attention). I am by no means a skilled mechanic, but if you have the proper tools, an engine hoist, and a service manual, the chore is not that daunting. (famous last words)....I am currently working on my port engine and have not run into any snags.

[rodbolt17]

it is so stupidly simple a MONKEY can do it.
note to self, buy a monkey.

if you have a way to lift the power head.

it is about dirt simple after that.
takes about 8 hours.

[fairdeal]

it is so stupidly simple a MONKEY can do it.
note to self, buy a monkey.

LOL

seems, from what I've read, commonly the customer is advised that "while we're at it"
- pay to have the speedy sleeve installed & oil pump replaced

just curious: what's your thoughts on that?

[ausnoelm]

I'm flying down to FL tomorrow morning to at a 26 CC with twin 2004 225 4 strokes.
But are ALL 2004 Yamaha 225's corroded???

Great Forum!

Thanks,

No, not yet....give them time.

[rodbolt17]

depends on the engine hours.
we typically see the crankshaft seal surface fail at about 1200-1400 hours.
the oil pumps don't wear out.
there is only 1 moving part in the pump.
however after 1200 hours in salt water you cannot remove the screws to open up the pump to replace the seals.
if you can get the screws out the pump is simple.

[wkendwarrior]

The trip went pretty good. The engines water test went very good. Loaded it onto the trailer and was at the mechanic in 20 minutes. Lower unit fluid was clear. Strong cylinders (210). Life history of motor's were 99% below 4000 rpm's.
Now we looked up the guts to look for the "corrosion"! Port motor Clean. Starboard motor I spotted a very small spot way up on the top. Sh!t . Everyone in the shop agreed it was the start of "corrosion". 1700 hours and now it shows. The mechanic thought since the motors were going to fresh water for the next 10yrs of it's life it will be fine. No guarantee's of course. Was quoted $2,500 to install the KIT.

Thoughts???

[pstephens46]

Did you look with flashlight or bore scope device? I believe Rodbolt has mentioned in the past that you have to be able to see the gaskets up top. He also said it's not really a water issue. If flushing can't help prevent, then I don't believe fresh water will matter.

You might consider bore scoping twice a year to keep an eye on it. I am curious about a 26ft twin engine boat for fresh water use?

[rodbolt17]

the corrosion is in the DRY side of the ex. you can flush till the cows drown and guess what?
you still have not got any fresh water on the corroded area.
without a bore scope you simply cannot see the eroding materiel.

[fairdeal]

If flushing can't help prevent, then I don't believe fresh water will matter.

I suspect they are referring to the perception that -

purely on an internet anecdote / self-report basis -

this particular corrosion is virtually unknown in engines NOT operated in salt water