4-Tec Rebuild Engine Break in--

[dharrison0001]

Anyone ever run boat on trailer (in water) for engine break in? Warranty expires 4/24/09--water will be way too cold to put any kind of hours on new (rebuilt) engine, only put 5 hours on last year before got too cold.

Also, any ideas about after how many hours rebuild would hopefully be ok, or put another way how many hours they'll usually blow up in if not assembled correctly?

This is replacement engine for first rebuild that blew up after approx. 10hrs (dropped valve supposedly). Cost me over 8 bills in labor to have engine replaced again. Would like to run this one long enough to see if it blows too!

Thanks!!

 

[nswillin]

Do not try to break the engine in out of the water. You should be able to do it in any temp water as long as it isn't ice. Your going to be puttin around real slow so just be careful and don't fall off in the cold water. Remember heat is your worst enemy with a new engine.

Break in for the four -techs are much different than than 2-strokes. Proper break takes 10 hours of riding at no more than 3/4 throttle and varying it as you go. Do not cruise around at the same speed the whole time, just take it easy. Unlike the 2-strokes, do not add any oil to the fuel at any time.

After ten hours, your good.

I'm really surprised. The shop that is doing this engine work for you should explain in detail the importance of the break in and how to do it. Seems like they just want to keep putting engines in for ya.:cheers:

 

[05GTXSC]

Anyone ever run boat on trailer (in water) for engine break in? Warranty expires 4/24/09--water will be way too cold to put any kind of hours on new (rebuilt) engine, only put 5 hours on last year before got too cold.

Also, any ideas about after how many hours rebuild would hopefully be ok, or put another way how many hours they'll usually blow up in if not assembled correctly?

This is replacement engine for first rebuild that blew up after approx. 10hrs (dropped valve supposedly). Cost me over 8 bills in labor to have engine replaced again. Would like to run this one long enough to see if it blows too!

Thanks!!

If you see what I bolded he says it will be on the trailer but I still don't think it is a good idea.

 

[nswillin]

Do not try to break the engine in out of the water. You should be able to do it in any temp water as long as it isn't ice. Your going to be puttin around real slow so just be careful and don't fall off in the cold water. Remember heat is your worst enemy with a new engine.

Break in for the four -techs are much different than than 2-strokes. Proper break takes 10 hours of riding at no more than 3/4 throttle and varying it as you go. Do not cruise around at the same speed the whole time, just take it easy. Unlike the 2-strokes, do not add any oil to the fuel at any time.

After ten hours, your good.

I'm really surprised. The shop that is doing this engine work for you should explain in detail the importance of the break in and how to do it. Seems like they just want to keep putting engines in for ya.:cheers:

See what I bolded and there is your answer.

 

[05GTXSC]

Sorry I read the first part and just skimmed the last part I get what you are saying.

 

[dharrison0001]

Do not try to break the engine in out of the water. You should be able to do it in any temp water as long as it isn't ice. Your going to be puttin around real slow so just be careful and don't fall off in the cold water. Remember heat is your worst enemy with a new engine.

Break in for the four -techs are much different than than 2-strokes. Proper break takes 10 hours of riding at no more than 3/4 throttle and varying it as you go. Do not cruise around at the same speed the whole time, just take it easy. Unlike the 2-strokes, do not add any oil to the fuel at any time.

After ten hours, your good.

I'm really surprised. The shop that is doing this engine work for you should explain in detail the importance of the break in and how to do it. Seems like they just want to keep putting engines in for ya.:cheers:

Thanks for reply--With 1st engine I did a bunch of research on break in, so pretty much followed all instructions (exactly as yours in post). Was REALLY careful with it, still blew-up. Think it was a bad rebuild. That's why I'm trying to figure out a way to put some hours on this engine (before warranty expires in 3 weeks) without freezing my *** off.

 

[kustomkarl]

You really don't have a choice. You will have to either go on vacation here in Florida or freeze your butt off. It's low 80's today and water temp is mid 60's. You should do a weekend vacation here for a break in.

Karl

 

[seadoosnipe]

I'm lookin and lookin and lookin and still can't find it!

So, I've read through this thread like, 4 times searching for the year model of your boat. The only 2 real things I believe I've been able to figure out by process of elemination is:

It is a boat with a 4-TEC engine...

It is a boat with a relatively new 4-TEC engine in it.

The reason I ask is because of that one question. Root cause. Do you know why the motor blew up? If not, then what's to say this new one isn't going to blow up. Just taking out something broken and putting in something that works again doesn't solve the root cause as to why it broke in the first place.

The real reason for me to put my 2 cents worth is because you also make the statement that you had a dropped valve (supposedly).

I'm sure you know how much money these engines cost, you just bought one. Probably paid 1/3 of the price for the engine, the other 2/3 of the price for the jacking................sorry, paid it for the expert work for a dealers installation.

If you do some research, you'll find that Seadoo has had a problem with dropping exhaust valves, especially on the #3 piston, and blowing motors. When the motor is taken down, it's found to be from water incursion. This is not covered by warranty. If this happens to someone on a ski, they have to proove that they didnt' flip the ski. The boat?..........that would be a harder position Seadoo would have to say you ingested water.

If this motor was practically new, say 2007 or better, and you had taken care of it, got it serviced like you were suppose to, then why would you blow an engine or drop a valve?

A light mist of water vapor, from jumping waves or just the moisture content while on the water, is enough to collect in the air induction of the motor. When this moisture makes it's way into the heads and hits the exhaust valves, there is a potential for damage to the valve train, usually the exhaust valves are the only ones affected.

So, find out from the mechanic, which valve caused the engine to blow up. If it was indeed the exhaust and this engine isn't but a year or so old, I'd be on the phone to BRP looking for some answers. Unless you have $5K to throw away on anohter motor................:cheers:

 

[dharrison0001]

So, I've read through this thread like, 4 times searching for the year model of your boat. The only 2 real things I believe I've been able to figure out by process of elemination is:

It is a boat with a 4-TEC engine...

It is a boat with a relatively new 4-TEC engine in it.

The reason I ask is because of that one question. Root cause. Do you know why the motor blew up? If not, then what's to say this new one isn't going to blow up. Just taking out something broken and putting in something that works again doesn't solve the root cause as to why it broke in the first place.

The real reason for me to put my 2 cents worth is because you also make the statement that you had a dropped valve (supposedly).

I'm sure you know how much money these engines cost, you just bought one. Probably paid 1/3 of the price for the engine, the other 2/3 of the price for the jacking................sorry, paid it for the expert work for a dealers installation.

If you do some research, you'll find that Seadoo has had a problem with dropping exhaust valves, especially on the #3 piston, and blowing motors. When the motor is taken down, it's found to be from water incursion. This is not covered by warranty. If this happens to someone on a ski, they have to proove that they didnt' flip the ski. The boat?..........that would be a harder position Seadoo would have to say you ingested water.

If this motor was practically new, say 2007 or better, and you had taken care of it, got it serviced like you were suppose to, then why would you blow an engine or drop a valve?

A light mist of water vapor, from jumping waves or just the moisture content while on the water, is enough to collect in the air induction of the motor. When this moisture makes it's way into the heads and hits the exhaust valves, there is a potential for damage to the valve train, usually the exhaust valves are the only ones affected.

So, find out from the mechanic, which valve caused the engine to blow up. If it was indeed the exhaust and this engine isn't but a year or so old, I'd be on the phone to BRP looking for some answers. Unless you have $5K to throw away on anohter motor................:cheers:

Seadoo RXP '05 4-Tec 215 Supercharged Intercooled--
Long story short--Bought boat, found out guy I bought it from filled up cylinders with water trying to run on a hose, he turned hose on, then engine didn't start because battery low. Once he charged battery, tried to crank engine, engine was hydrolocked, bent rod. He paid for rebuild engine and installation.
Rebuild was from "the largest manufacturer of rebuilt pwc engines" if you get my drift. According to them, "a valve lost a keeper", dropped valve, who knows what really happened. Engine was toast, I paid labor to have it replaced, but I'm about out of warranty (of course).
Today's high was mid 30's, tonight low of 22 degrees. Guess I'll just have to hope this one doesn't blow too, doesn't look like I can put any more hours on engine before warranty gone...