hard warm starting problem

[DaUpJetSkier]

my backup ski 550 doesnt want to fire when the engine has been ran for a while or is warm. It will start right after its turned off but a few minutes or longer and it takes my magic touch that none of my friends or my girlfriend has. The ski starts no problem when cold and it also has a primer. Primer doesnt seem to help when warm, sometimes I'll give it full throttle and hold the start for a while and I can just feel it wanting to blip and finally it will after a few tries. Ski runs fine, havent checked the plugs yet but if they are oily at all would that rich mixture cause this to happen and if so how do I fix it on the 44bn carb.

 

[SUPERTUNE]

Very normal for piston port 550's to do that with older BN44's You'll need rebuild the carb (USE ONLY A GENUINE MIKUNKI KIT) and there is a welsh plug (flat-freeze) on the carb that have a habit of leaking all the time and needs to be sealed with 2-part epoxy!! Make sure you replace the needle valve assembly too as these carbs use low pop-off and needle valves leak very easy with just the slightest wear. Now your really making me feel old! :headbang:
Team Scream Racing
1988 Carroll St.
Clearwater, Fl. 33765
(727)442-7700

 

[sclevela]

Very normal for piston port 550's to do that with older BN44's You'll need rebuild the carb (USE ONLY A GENUINE MIKUNKI KIT) and there is a welsh plug (flat-freeze) on the carb that have a habit of leaking all the time and needs to be sealed with 2-part epoxy!! Make sure you replace the needle valve assembly too as these carbs use low pop-off and needle valves leak very easy with just the slightest wear. Now your really making me feel old! :headbang:
Team Scream Racing
1988 Carroll St.
Clearwater, Fl. 33765
(727)442-7700

lol........ i knew this thread was gonn be about a js550 before i even opened it..... wish i had u around when i was in highschool racking my brain trying to figure out wtf the proble,m was......... hell i think every js550 owner knew u back then.

 

[surfjetlouie]

Mikuni carb kit

Very normal for piston port 550's to do that with older BN44's You'll need rebuild the carb (USE ONLY A GENUINE MIKUNKI KIT) and there is a welsh plug (flat-freeze) on the carb that have a habit of leaking all the time and needs to be sealed with 2-part epoxy!! Make sure you replace the needle valve assembly too as these carbs use low pop-off and needle valves leak very easy with just the slightest wear. Now your really making me feel old! :headbang:
Team Scream Racing
1988 Carroll St.
Clearwater, Fl. 33765
(727)442-7700

I have the kit brand new $20 shipped mikuni brand.

 

[DaUpJetSkier]

is that all I would need for the rebuild?

 

[surfjetlouie]

Mikuni 34,38, 44 rebuilt kit

is that all I would need for the rebuild?

maybe get the needle and seat also the h and l speed screws.
Louie