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+--- Thread: Coolant leaking from float bowl (/showthread.php?tid=81592)
Coolant leaking from float bowl - ilzak - 12-04-20
Hey lads,
this is something quiet weird i noticed today.
Went for a somewhat longer ride and after taking a break the entire right side of the engine was white.Had a closer look at it and saw that the right float bowl was dripping. I suppose it is coolant since it smells like it and has a greenish tint to it.Gas wouldn't leave a white film over the engine as well right?
Anyway, if I'm right and it is coolant, how the hell does it get into the float bowl?
Re: Coolant leaking from float bowl - bigsteve - 12-04-20
[size=78%] [/size]
[/size] sounds like one of the carb heater pipes is leaking I had similar problem turned out pipe had split [size=78%]
Re: Coolant leaking from float bowl - Gnasher - 13-04-20
(12-04-20, 10:00 PM)bigsteve link Wrote: [size=1.45em] sounds like one of the carb heater pipes is leaking I had similar problem turned out pipe had split [/size]
:agree
Yep
Re: Coolant leaking from float bowl - BBROWN1664 - 13-04-20
I have exactly the same problem at the moment. It is the carb heater circuit to help prevent carb icing in winter. If you dont ride in winter (cold damp conditions) then you can bypass the circuit. I have just (10 mins ago) ordered the pipe to bypass it. you will need 6mm internal diameter fuel/water hose to go from the thermostat under the tank to the radiator. Alternatively, you can pul the inlet and outlet pipes off teh carbs and join them with a brass coupler (4 or 6mm) and a couple of jubilee clips.
The alternative it to remove the carbs and replace the hoses under the carbs.
Re: Coolant leaking from float bowl - darrsi - 13-04-20
(13-04-20, 01:58 PM)BBROWN1664 link Wrote: I have exactly the same problem at the moment. It is the carb heater circuit to help prevent carb icing in winter. If you dont ride in winter (cold damp conditions) then you can bypass the circuit. I have just (10 mins ago) ordered the pipe to bypass it. you will need 6mm internal diameter fuel/water hose to go from the thermostat under the tank to the radiator. Alternatively, you can pul the inlet and outlet pipes off teh carbs and join them with a brass coupler (4 or 6mm) and a couple of jubilee clips.
The alternative it to remove the carbs and replace the hoses under the carbs.
Which are the pipes that get clogged up then, i thought they were much smaller than that?
Re: Coolant leaking from float bowl - BBROWN1664 - 13-04-20
(13-04-20, 03:56 PM)darrsi link Wrote: [quote author=BBROWN1664 link=topic=26072.msg312455#msg312455 date=1586782725]
I have exactly the same problem at the moment. It is the carb heater circuit to help prevent carb icing in winter. If you dont ride in winter (cold damp conditions) then you can bypass the circuit. I have just (10 mins ago) ordered the pipe to bypass it. you will need 6mm internal diameter fuel/water hose to go from the thermostat under the tank to the radiator. Alternatively, you can pul the inlet and outlet pipes off teh carbs and join them with a brass coupler (4 or 6mm) and a couple of jubilee clips.
The alternative it to remove the carbs and replace the hoses under the carbs.
Which are the pipes that get clogged up then, i thought they were much smaller than that?
[/quote]
It is those pipes and the waterways in the carbs that get clogged
Re: Coolant leaking from float bowl - Gnasher - 13-04-20
(13-04-20, 03:56 PM)darrsi link Wrote: Which are the pipes that get clogged up then, i thought they were much smaller than that?
Whe the system fails 9 out 10 it's not the pipes but the small elbows the pipes join to, they're made of steel and corrode internally if the coolant isn't kept to correct ratios. You can't get them from Yamaha they come with the crab body and I fairly certain you can no longer buy a new carb body, too old now :eek
Re: Coolant leaking from float bowl - darrsi - 14-04-20
(13-04-20, 06:39 PM)Gnasher link Wrote: [quote author=darrsi link=topic=26072.msg312463#msg312463 date=1586789784]
Which are the pipes that get clogged up then, i thought they were much smaller than that?
Whe the system fails 9 out 10 it's not the pipes but the small elbows the pipes join to, they're made of steel and corrode internally if the coolant isn't kept to correct ratios. You can't get them from Yamaha they come with the crab body and I fairly certain you can no longer buy a new carb body, too old now :eek
[/quote]
Maybe that's what i had in mind, i was shown years ago and vaguely remember the elbow part, but i've never cleaned it myself before so wasn't sure.
Re: Coolant leaking from float bowl - Disorderlypunk - 14-04-20
i just blocked the inlet/outlet using rubber caps and clips and removed all the associated pipes
Re: Coolant leaking from float bowl - ilzak - 27-04-20
Thank you guys for you help. Just wanted to let you know that i fixed it like some of you already suggested.
I took the hose that goes from radiator->carb and just plugged it back into the radiator where the coolant would go back in.The other hose that goes go from carb->radiator now acts as a seal so nothing gets into the carb. So its just a useless hose that goes from carb inlet to carb outlet.
Works like a charm.