Vectornut
TY 4 Stroke Junkie
- Joined
- Nov 18, 2007
- Messages
- 526
- Reaction score
- 30
- Points
- 878
- Location
- Eden, Vermont
- Country
- USA
- Snowmobile
- RS Vector
Yamaha also makes a carb sync thats easy to use. Part #YU44456-90890-03094. It's basically a vacuum gauge that easily hooks up to the carbs. Syncronizing the carbs really makes a difference.
coopersvilledump
Veteran
I cleaned the carbs again and it helped, but the problem is not solved. The idle jumps around alot. They definately need to be synced.
jamesc
Pro
Mike are you sure about those PN for the synchronizing tools? i've seen a couple different things in looking around. the one pic looks like a vacuum gauge with a multi-port valve. i think that YU44456 number is a vacuum mate and it's like $700. i'm getting conflicting info on these tools and part numbers
homer2210
Extreme
is it difficult to clean the carbs? do you have to remove them to clean them? does someone have a step by step cleaning process? I am worried that if I remove them to clean them then when I go to re-install them I will mess something up for sure.
Groomerdriver
TY 4 Stroke Master
homer2210 said:
If you're unsure AT ALL how to do it, let a GOOD dealer do it for you. One hour @ $shop rate$.
The damage you can do by not doing it right could cost you thousands.
homer2210
Extreme
can I dump some seafoam right into the carbs?
homer2210
Extreme
nevermind, i found it
Vectornut
TY 4 Stroke Junkie
- Joined
- Nov 18, 2007
- Messages
- 526
- Reaction score
- 30
- Points
- 878
- Location
- Eden, Vermont
- Country
- USA
- Snowmobile
- RS Vector
Jamesc. The part number I show is from page 1-5 of the Yamaha Service Manual 8FJ-28197-10. Give that a try. MiKe.
minnewawa
Newbie
- Joined
- Oct 29, 2010
- Messages
- 12
- Reaction score
- 0
- Points
- 101
I don't know what everyone like for cleaning carbs, but i got some marine cleaner that takes the build up off better than anything i have ever used. Better than any Carb cleaner.
Irv
TY 4 Stroke God
- Joined
- Mar 23, 2005
- Messages
- 3,778
- Reaction score
- 43
- Points
- 1,233
- Location
- ONT. Canada
- Country
- Canada
- Snowmobile
- 2008 40th Anniversary Vector.
1995 XLT SP (Son's)
minnewawa said:
Name/link?
minnewawa
Newbie
- Joined
- Oct 29, 2010
- Messages
- 12
- Reaction score
- 0
- Points
- 101
it is called carbon free by Sierra International
www.teleflexmarine.com
www.teleflexmarine.com
coopersvilledump
Veteran
Alright, I did a vacuum test and I am reading between 3 in. and 17 in. very rapidly at idle. As I increase rpms the needle starts to steady, but still jumps 3 in. as it gets up to 15in. Any ideas? This could mean worn valve guides. I find that hard to believe. Could it do this if the timing was off? I don't know if the tensioner was swapped or not. It has 5000 mi on it. I just want to know if anybody has any ideas before I take it apart.
Groomerdriver
TY 4 Stroke Master
coopersvilledump said:
Take what apart? Why take ANYTHING apart until you know for sure what's causing the problem?
coopersvilledump
Veteran
To be able to check the timing and valves, I will have to tear into the motor.
coopersvilledump
Veteran
Problem found- Timing is 1 tooth off at the crank
I am guessing someone has replaced the cam tensioner.
I am guessing someone has replaced the cam tensioner.
