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2006 rxt
- Thread starter Sea dog
- Start date
- Status
I have a 2002 4-tec GTX (155hp) and it has only 46 original hours on it. Was out riding today and it quit instantly with no noises or banging.
When I press the start button the PTO slowly jerks and turns but also pushes in and out about 1/4" while turning and making ugly sounds. It appears the same thing has happened to mine. Btw my pistons do move up and down but barely. Its not really getting a good contact with the starter I suppose. Of course while out there my other ski (99 GSX RFI) had a rectifier failure. I am so tired of Seadoo products. This stuff just doesn't happen to Yamaha's. I hope to pull it apart this coming week. Summer is too short here on Long Island for this BS.
When I press the start button the PTO slowly jerks and turns but also pushes in and out about 1/4" while turning and making ugly sounds. It appears the same thing has happened to mine. Btw my pistons do move up and down but barely. Its not really getting a good contact with the starter I suppose. Of course while out there my other ski (99 GSX RFI) had a rectifier failure. I am so tired of Seadoo products. This stuff just doesn't happen to Yamaha's. I hope to pull it apart this coming week. Summer is too short here on Long Island for this BS.
Michael211_2000
New Member
How can you tell that? How can you see that?
Oh I bet there are Yamaha forums online with people having all sorts of issues... just, different issues mostly. LOL!
They're all infernal machines no doubt about it!
- Michael
Actually I cant see the PTO turn. I assumed it is turning because the pistons are moving. I can see the carbon ring bellows moving in and out though.
Yes you are right. They all suck. I am just pissed with my Doo's right now. For what its worth my Speedsters starboard engine smoked a stator two weeks ago and cooked the harness (actual fire!). I didn't even look at it yet (parked). Today was the first day back in the water and both other Doo's failed.
Frustrated!!!!!!
All of my stuff is in tip top shape too. Just a bad run of luck I suppose.
Yes you are right. They all suck. I am just pissed with my Doo's right now. For what its worth my Speedsters starboard engine smoked a stator two weeks ago and cooked the harness (actual fire!). I didn't even look at it yet (parked). Today was the first day back in the water and both other Doo's failed.
Frustrated!!!!!!
All of my stuff is in tip top shape too. Just a bad run of luck I suppose.
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Michael211_2000
New Member
Yeah well when it rains it pours as the saying goes.... sorry man. :-(
Something's definitely come apart in the pto assembly, whether it's broken fly-wheel bolts or what you won't know till you pull the PTO assembly off the back of the engine. Fun, fun!
The screwy thing is those people who never change their engine oil never have the supercharger's serviced or do any maintenance and are still running the original cermic clutch washers and are almost to 300 hrs or more on the things... how is that even possible?????? Life is sooooo unfair sometimes! LOL!
- Michael
Something's definitely come apart in the pto assembly, whether it's broken fly-wheel bolts or what you won't know till you pull the PTO assembly off the back of the engine. Fun, fun!
The screwy thing is those people who never change their engine oil never have the supercharger's serviced or do any maintenance and are still running the original cermic clutch washers and are almost to 300 hrs or more on the things... how is that even possible?????? Life is sooooo unfair sometimes! LOL!
- Michael
I have read that debris can get in the oil. How can that happen? It appears the pto/stator assembly is sealed inside that housing. I found that this is a known issue for all 4-tec engines made from 02-05. In 06 Seadoo started using stronger bolts. Some guys have reported wiping out the entire engine due to copper going in the oil.
Michael211_2000
New Member
So you still have your twin Yamaha's to ride right? You are blessed with A LOT of watercraft! LOL! Good thing too...
- Michael
- Michael
Michael211_2000
New Member
Well it turns out the crankshaft snapped right after the #3 main bearing. I took the magneto cover off and when I grab the crank(the magneto cup still bolted on) I can move it up and down. I can also turn it by hand and watch the t-chain rotate but no movement from the pistons. I will now be pulling the engine to access the damage. This blows!!! Man this is just the 155hp motor....
Btw are the 4-tec cranks all the same? I will put that on the list of things I need.
Btw are the 4-tec cranks all the same? I will put that on the list of things I need.
Michael211_2000
New Member
I do not know for certain if all the 4-tec cranks are the same or not... I believe they are though. The base 4-tec engine is 155hp, add a supercharger and you get the 185hp engine, then add an intercooler and you get the 215hp engine... but all that's doing is adding things to the base 4-tec engine, I don't think they actually change the pistons or crank or anything inside the engine case when they increase the horsepower on these motors.
I have heard of 4-tec's breaking crankshafts before, but I've no idea WHY the crankshaft breaks. To me, that's the mystery here... we know why they'll eat exhaust valves (the sodium filled hollow valve stem develops cracks then breaks clean off), and we know most of the ways the superchargers can fail, some of the engines had shit timing chains and others had crappy starter gear (aka "flywheel") bolts that break, but I've yet to read a reason for the crankshaft failures when nothing else is broken BUT the crankshaft. Weird!
- Michael
I have heard of 4-tec's breaking crankshafts before, but I've no idea WHY the crankshaft breaks. To me, that's the mystery here... we know why they'll eat exhaust valves (the sodium filled hollow valve stem develops cracks then breaks clean off), and we know most of the ways the superchargers can fail, some of the engines had shit timing chains and others had crappy starter gear (aka "flywheel") bolts that break, but I've yet to read a reason for the crankshaft failures when nothing else is broken BUT the crankshaft. Weird!
- Michael
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