Thread: Gas valve failure
01-21-2008, 06:13 PM #1
Gas valve failure
During a valve inspection I noticed one had a shiny area on the blade. Took it apart and found the valve had snapped at the stem and the ring was actually touchin the valve!!!
Anybody else broke a Riva Gas valve paddle?
01-21-2008, 06:26 PM #2
I read a while back ago that someone had broke one, pretty rare occurence on this. Good news is, it does not fall in and take out your cylinder.
01-21-2008, 06:31 PM #3
- Join Date
- Oct 2006
ouch, it looks crystalised in the middle imho.
if it is its a flaw from manufacture.
01-21-2008, 06:33 PM #4
01-21-2008, 11:05 PM #5
How many hours? I'm glad it didn't mess up your piston and cylinder.
01-21-2008, 11:08 PM #6
This has happened twice to me, thats why I have pinned valves now.
First time it took out a cylinder and piston, second time only a piston....
They will not be back inside my motor.....
01-21-2008, 11:21 PM #7
- Join Date
- Dec 2005
- Lake Havasu City, AZ
Broken Gas Valves
I have seen several break at the groove for the air to get to the bellows. Fercho broke one - half the blade off - and it went out and never touched a thing!! Lucky Guy!
01-21-2008, 11:43 PM #8
Duke just out of curiosity did you check alignment of the adapter piece when you installed these? I have seen enough slop in the bolt holes that if you shift the adapter one way or another it will cause the shaft to bind.
01-22-2008, 08:10 AM #9
01-22-2008, 08:15 AM #10
Carl thinks the oring pushed over the stem causing a metal to metal contact eventually snapping the stem at its weakest point. He suggests the green SD O-rings. Makes sense and makes me feel a little better about the other 2.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By GP1500SC in forum Yamaha PWC Performance (2-stroke)Replies: 7Last Post: 11-01-2007, 05:32 PM
By John in forum Yamaha How To & FAQsReplies: 18Last Post: 05-04-2006, 04:48 PM
By IrishGpr05 in forum Yamaha PWC Performance (2-stroke)Replies: 5Last Post: 04-02-2006, 09:21 PM
By shooter98xpl in forum Yamaha PWC Performance (2-stroke)Replies: 1Last Post: 02-26-2006, 10:30 PM
By ramnj in forum Yamaha How To & FAQsReplies: 0Last Post: 12-28-2005, 09:11 PM