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Rotary gear

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Hollianne97

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First... Whats a thread? What am i stsrting?

well here goes... Had s stripped rotary gear, got it back and the gear was stripped on two sides, one side completely flattend. I asked what would have made that happen, since the engine was rebuilt when i bought it-9 hours was on it-and i asked if it could have been due to the shaft or the steel (whatever its made out of), gear on shaft, is it centered or placed where it is suppoosed to be? And where did the debri go that came off of rotary gear? They said that the engine didnt need to be cleaned, but flushed..... and that the shaft and all that entails, was good. Then the last minute the 12 volt light came on... And they traced it to rectifier, (which im pretty sure i could have replaced that my self!!! ). but anyway, the beeper beeps continuously, they werent sure why, then i arrived to pick it up... On my way home to drop it in and check it out!! but WHYYYYYY? What made the thing strip in the first place? Im thinking that, they just dont strip unless something is too tight or what?? .

.....but it can buy me a boat.....".
 
Hello,

I am not sure I understand fully your issue and I am not even sure about which one of your skis you are talking about. First, about a thread. A thread is a new question on a single subject (usually) or on a specific problem/symptom that you don't know the solution or fix. Usually you will not ask multiple unrelated questions in the same thread.

Now, about your question, you are probably referring to the "rotary valve" which is the equivalent to a timing chain or a timing belt on a automobile, but for older Sea-Doo's. That being said, if your rotary valve is stripped or bent (I had that this summer), this would mean that you had some debris in the crank that got into the rotary valve. If that has happened, it usually means a full rebuild of your engine.

You mentioned that your engine was rebuilt not long ago, but was it a top-end rebuild or a complete rebuild? This will make all the difference. Unless the whole engine was rebuilt, there could have been some debris that was left behind causing that. And in the case a full rebuilt was done and that the previously damaged rotary valve was used again, it would be a bit silly.

In the end, is your ski running OK or not? If not, what are the symptoms aside from a continuous beep?

Benji.
 
The rotary gears don't just strip. The crank is steel and the gear is brass so it is softer. The idea is that if a bearing goes bad or something stops the rotary valve it will trash the soft brass gear and not damage the crank. I would say either something fell in the carb and stopped the rotary valve or a bearing went out on the rotary shaft. The shaft sand bearings can be removed without splitting the cases but it is very hard to get all the debris out. If it were mine I would split the cases and replace the bearings and shaft. Typically when the brass gear strips it bends the rotary shaft and it will do it again if the shaft isn't replace. SBT had a great price on the refurbished shaft and gear assembly.

The 12V low is typically from a bad battery or voltage regulator so they might have been correct on this although the regulators are known to be faulty an old battery can cause the same symptoms on any fuel injected seadoo as they need a minimum of 12 volts. I would check the battery first then move on to the voltage regulator.

As far as the beeper it is a warning for overheating so if it is on all the time you have a bad wire or sensor. All it toes is ground the sensor wire to turn the beeper on. If it is doing it only when running a little while it could be overheating but if it does it at first start it is probably the wire or sensor. I would unplug the sensor and see if it stopps first then report back.

BTW: welcome from another Californian, pray for rain. You have come to a great site for seadoo info.
 
I would keep your thread here. It is easier to answer and track your issues for us on the same ski.

No offense Benji but pleas don't start a new thread for every question on one ski.
 
[MENTION=53237]mikidymac[/MENTION] Almost same answers at the same time. The rotary valve gets stripped from a upward condition unless some mechanics reused a stripped rotary valve after rebuilding...

I said: "on a single subject (usually) or on a specific problem/symptom that you don't know the solution or fix. Usually you will not ask multiple unrelated questions in the same thread".

This meant specific problems on a specific ski. If you read my threads before, I understand clearly what this forum is about even if English is not my mother tongue.

Benji.
 
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hhhhhhggggggvgggg vhgu. Hhhghgggghhh. Hhhgggh. Hhhggvvv
Hello,

I am not sure I understand fully your issue and I am not even sure about which one of your skis you are talking about. First, about a thread. A thread is a new question on a single subject (usually) or on a specific problem/symptom that you don't know the solution or fix. Usually you will not ask multiple unrelated questions in the same thread.

Now, about your question, you are probably referring to the "rotary valve" which is the equivalent to a timing chain or a timing belt on a automobile, but for older Sea-Doo's. That being said, if your rotary valve is stripped or bent (I had that this summer), this would mean that you had some debris in the crank that got into the rotary valve. If that has happened, it usually means a full rebuild of your engine.

You mentioned that your engine was rebuilt not long ago, but was it a top-end rebuild or a complete rebuild? This will make all the difference. Unless the whole engine was rebuilt, there could have been some debris that was left behind causing that. And in the case a full rebuilt was done and that the previously damaged rotary valve was used again, it would be a bit silly.

In the end, is your ski running OK or not? If not, what are the symptoms aside from a continuous beep?

Benji.
 
I dont get how to reply or respond.. Ug. This phone is gonna fly in two seconds! Haha. Jk Okay im typing!! Not sure to who!

Thank you for the responses! I am so excited about this forum, i didnt really think that anyone would actually read and respond to any of my stupid questions and concerns, but people do, every time ive written something in here, everyone is so helpful and nice about everything.

Okay, to respond to ?? Im speaking of the gtx rfi (the gti is now in shop due to a shredded pto boot, and leaking bellow)

the engine rebuild, i believe it was the upper end, only because the price was about 1400.00. It was done before i bought them.... So when i did my homework on what the heck a rotary valve does, i was confused about the engine rebuild. Im thinking 1-why did it need to be rebuilt? In the first place. What happened? 2-what was rebuilt-the invoice is a copy and faded a bit, 3-what caused it, common sense tells me that it will keep happening.... I expressed my thoughts to the guy who works on them, about the debri (any debri), in the engine, i asked about the condition of the shaft, he said everything looked good, and he said he has never seen one strip on "both sides", only one side or the other. He thinks it was an oversite. But i am thinking, "H O W?" How do you oversee the very center gear of an engine that rotates that saw blade looking thing?? which ??? I think, controls the fuel/air mixture?? I dunno, .... Just seems random.. For this gear to just strip!! I am back to my original question, "W H Y".

That is me though, "why" this and "why" that and "if this does this, then why is this doing that".... I will drive a guy crazy with this.... So, my point, i think he was done with my 101 questions and observations... So i didnt keep asking, i will be putting it in the water as soon as it warms up a little, i cant wait!! I have a problem!! I want to be out on the water every day!!! Its not good to have the delta right in the backyard!! I will post how it is running.. Do ya think towing things could cause this? I drug a dock that was in the toolies home, i towed another boat, found another dock with foam stuff and drug it home... I now have a dock in the backyard!! But maybe towing all that stuff wasnt a good idea??

As for the 12v thing. I dunno, it didnt do that before, but i dunno. t
 
A THREAD is all the replies to you. Your initial POST is what creates the thread. So you POSTed a question and others posted within your POST. As the post, the thread is built as it THREADs down to hopefully an answer.


Sent from my iPhone using Tapatalk
 
Let us know how it runs now.

Towing can cause it to overheat and might be why your beeper was going off.
 
How much does a full 2-stroke rebuild costs in the US when it is done by a dealer or a mechanics? I heard tha a RFI is more expensive but I can tell that a full rebuilt in Canada will be in the vicinity of 3,000.00$ CDN.

At 1,400.00$, sounds like it was a top end rebuild which would be sad.

Benji.
 
lol. I love this. Okay, so let me just say that this ski is sooo much different than my other one. Not sure exactly why but this one was soooo smooth, and quiet, it was pretty choppy out there and it glided over the caps. Then, this is probably me being paranoid, it got a little louder... Kinda like the sound of the drivr line clanking and it feels like its being held back..but it cavitated a little, and it didnt do that when i first took off. Does that make sense? And it may be i am used to the gti, because i cant seem to get both damn skis running at same time... So hard to learn each one. But all in all it was so good to get back out there. I freaking love it!! Also, there is a vague backfiring at take off, so i drove it back home and pulled it out, i will check fhe spark plugs tomorrow, see what they look like... I guess. I have brand new ones, gapped with that goo junk ready to slap on the threads. Cant believe the difference in the two. So, the issue with the gti, hopefully, the pto boot and bellow thing, is due to not having grease and not some bearing, bent shaft, prop thing.. Ug. And i thought having a volvo was bad!!
 
I could see $1400 being a top end from a dealer since they probably have the same amount of hours in it as you would for an engine swap. I am shocked the dealer didn't push for a swap that is much easier to do and safer. I have only been to a powersports dealer for 3 things to get fixed. 2 tires swap on my motorcycle and a shock spring on my motorcycle since it was cheaper than buying the tools. The dealers just charge to much per hour $85 on up per hour.
 
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