800 Strange Starting Issue

DRIVEBYE · Dec 8, 2017

I passed my 15 800 onto my dad and it has a strange starting issue. When the machine is cold after sitting even for months it starts in 2 pulls at most. About once or twice on almost every ride after it is warm it will take 50 pulls etc to get it started. Does anyone have any idea why this is happening? It has been tuned up and looked over etc by a dealer...

Dad is older and this is a real pain for him. Most the time I have to go help him out.

Lake Powell · Dec 8, 2017

I had the same issue under warranty and it took several try's at my dealer but they finally got it right. Never did tell me what was causing it but it took several calls to the factory about it though. It was on my 15 154 in it's second year. I have a great dealer Rifle Performance Motorsports in Rifle, CO

utahpowder1 · Dec 8, 2017

If the sled fires up after a cool off period but does not start when the engine continues to be hot, you may have a vapor lock in the fuel line. Perhaps move any fuel line away from close proximity of the engines heat or place a insulating barrier around those fuel lines. Hope this is helpful.

DRIVEBYE · Dec 8, 2017

Lake Powell said:
I had the same issue under warranty and it took several try's at my dealer but they finally got it right. Never did tell me what was causing it but it took several calls to the factory about it though. It was on my 15 154 in it's second year. I have a great dealer Rifle Performance Motorsports in Rifle, CO

Any clue if they would still recall what it was?

Where do you go in Powell? I am there a lot.

DRIVEBYE · Dec 8, 2017

utahpowder1 said:
If the sled fires up after a cool off period but does not start when the engine continues to be hot, you may have a vapor lock in the fuel line. Perhaps move any fuel line away from close proximity of the engines heat or place a insulating barrier around those fuel lines. Hope this is helpful.

Weird part is sometimes when hot it starts just fine. But I will take a look thanks.

utahpowder1 · Dec 8, 2017

Just another thought. If you are running ethanol fuel, it will readily absorb water and it too may be a cause of a vapor lock. Please post if you find the solution to this issue.

DRIVEBYE · Dec 8, 2017

utahpowder1 said:
Just another thought. If you are running ethanol fuel, it will readily absorb water and it too may be a cause of a vapor lock. Please post if you find the solution to this issue.

Always non E...I will

Also where do you ride? My sleds are kept in Heber, ride up above Kamas a lot.

Lake Powell · Dec 8, 2017

DRIVEBYE said:
Any clue if they would still recall what it was?

Where do you go in Powell? I am there a lot.

They might but they were vague at the time. Go out of Bullfrog and usually down to the Escalante. Had to give up the houseboat this year though. Us three partners just couldn't afford it anymore with the 25% increase in buoy fees and then the mussels. Just called dealer and he can't recall but probably a reflash on the computer.

DRIVEBYE · Dec 8, 2017

Lake Powell said:
They might but they were vague at the time. Go out of Bullfrog and usually down to the Escalante. Had to give up the houseboat this year though. Us three partners just couldn't afford it anymore with the 25% increase in buoy fees and then the mussels. Just called dealer and he can't recall but probably a reflash on the computer.

I spoke to my dealer and he said there are 2 things it could be he is going to look it over.

Ha I launch at Bullfrog and almost always stay is Escalante also.

utahpowder1 · Dec 8, 2017

I typically ride from Noblett's parking lot to the summit of Wolf Creek pass. Occasionally will ride Strawberry, Soapstone, Bear River and this year will be heading to Togwotee. Ride a turbo AC and recently purchased Polaris Axys, installed a turbo and wrap. So I am to blame for the lack of snow-Sorry to all the Utah riders!!

treeboy · Dec 8, 2017

Check the fuel pressure regulator, their a bit of a known problem for starting when the machine is warm.

rocks rev · Dec 9, 2017

My 16 did this but more like 10-12 pulls when hot, Fixed under warranty, not sure if it was fuel pump or regulator, I'll ask my dealer.

Blk88GT · Dec 9, 2017

My 16 did this when hot as well. Thankfully I have electric start but it was still a huge pain.

At first it was an ECU flash and set of plugs, the real issue was solved after replacing the fuel pump assembly. There is a bulletin for it.

DRIVEBYE · Dec 9, 2017

Thanks everyone. Dealer is checking the fuel P reg first.

Team Pigeon · Dec 9, 2017

Replace fuel filter then Run a tee in your fuel line and a line/ gauge to tour bars and see what fuel pressure is idling and throughout your rpm. And also when shut off.
I never had hot start issues but I had bogging when the engine was hot. Replaced pump assembly so I won’t know if it was the Regulator or the pump.

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Trashy · Dec 10, 2017

I would bet that it’s the fuel pressure regulator.

The symptoms are identical.

The regulator pops slightly out of its seat, still works when riding but can make it brutal to re-start when hot.

DRIVEBYE · Dec 10, 2017

You guys are awesome thanks

SNOMOBL · Dec 11, 2017

https://www.youtube.com/watch?v=SxCFelCm2gM

Trashy · Dec 11, 2017

SNOMOBL said:
https://www.youtube.com/watch?v=SxCFelCm2gM

He does the job. But unless I missed something he doesn’t show the failure. I didn’t notice if he mentioned where to buy that lock plate. I’m gonna guess it’s a Doo part. I made my own, was simple enough

FEZ · Dec 11, 2017

DRIVEBYE said:
I passed my 15 800 onto my dad and it has a strange starting issue. When the machine is cold after sitting even for months it starts in 2 pulls at most. About once or twice on almost every ride after it is warm it will take 50 pulls etc to get it started. Does anyone have any idea why this is happening? It has been tuned up and looked over etc by a dealer...

Dad is older and this is a real pain for him. Most the time I have to go help him out.

The 15's had a fuel pressure regulator issue. Have your dealer check for/do the update.

800 Strange Starting Issue

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