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2006 Nytro Cold Starting Issues

HydrogenCyanide

Veteran
Joined
Oct 21, 2020
Messages
41
Age
41
Location
Fort Erie
Country
Canada
Snowmobile
2006 Yamaha RS Nytro
2006 Yamaha Apex
Sled starts without issue. Unfortunately, the first time I start when it’s cold it stalls frequently. Start, it runs for 15 seconds with rough idle, stalls and will then restart and do it all over again. I have to keep doing this well beyond the time the warm up light goes off.

After about 10 minutes it runs fine and will start and run fine for the rest of the day. Any ideas on how to fix this?
 

Fast Lane

Veteran
Joined
Feb 6, 2020
Messages
45
Age
45
Location
Winnipeg
Country
Canada
Snowmobile
2007 Yamaha Nytro
Probably the pilot jets are starting to get plugged. I would replace the jets. I started mine up at -28C. Fired up right way. You have to baby sit the choke. Start slowly backing it off after a minute or so. It has to be off before the low temp light does off. Mine will always quit if the choke is still on and and the low temp light turns off.
 

Fast Lane

Veteran
Joined
Feb 6, 2020
Messages
45
Age
45
Location
Winnipeg
Country
Canada
Snowmobile
2007 Yamaha Nytro
I also heard people running a slightly richer pilot jet. I think stock are #45 and the next up are #48. Probably this spring I'll order the #48 and give them a try.

It may be a pain with the choke but it at least starts up. A number of friends have had issues starting Fuel Injected engines in the cold. They just dont start.
 

HydrogenCyanide

Veteran
Joined
Oct 21, 2020
Messages
41
Age
41
Location
Fort Erie
Country
Canada
Snowmobile
2006 Yamaha RS Nytro
2006 Yamaha Apex
Do you guys no where online to order new pilot jets? I’m searching but not having much luck. Any help is appreciated.
 

DGZRT

VIP Member
Joined
Feb 23, 2006
Messages
1,132
Location
Stevens Point Wisconsin
Country
USA
Snowmobile
2009 Vector LTX, 08 Vector shorty, 98 XTC 600, 17 Shitdoo 1200X
Try partszilla.com . Fast lane is spot on replace the pilots. You do have to babysit the choke at first startup . I usually progress mine down after the first min. If the choke is left on full when the light goes out it will die and possibly flood it . On my carbed Vectors I run Mechanic in a bottle for storage . Good stuff also Fitch fuel Catalyst in the tank to keep it fresh . You should Google, syncing the carbs and read up on that . It helps .
 

AZOLSC

Newbie
Joined
Nov 25, 2012
Messages
22
HOW OLD IS THE BATTERY?? IF LONGER THAN 6 MONTHS REPLACE IT YOU WOULDNT IMAGINE THE #*$&@ MY NYTRO DID AND THE AMOUNT OF HOURS I SPENT REPLACING AND CHECKING PARTS ONLY TO INSTALL A NEW BATTERY AND THE SLED RAN FINE EVEN IF U THINK THE BATTERY IS READING GOOD AND HOLDING THE CHARGE IF ITS OLDER THAN 6 MONTHS REPLACE IT ALWASY START THERE ON THESE NYTROS
 

smokingcrater

Expert
Joined
Feb 25, 2013
Messages
397
Location
Northern Plains
HOW OLD IS THE BATTERY?? IF LONGER THAN 6 MONTHS REPLACE IT YOU WOULDNT IMAGINE THE #*$&@ MY NYTRO DID AND THE AMOUNT OF HOURS I SPENT REPLACING AND CHECKING PARTS ONLY TO INSTALL A NEW BATTERY AND THE SLED RAN FINE EVEN IF U THINK THE BATTERY IS READING GOOD AND HOLDING THE CHARGE IF ITS OLDER THAN 6 MONTHS REPLACE IT ALWASY START THERE ON THESE NYTROS

RS Nytro's are carbed, and aren't nearly as picky about electrical issues as a FX. Yeah from the OP's post, it is a carb jet.
 


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