Pod Flame Arrestors and Water Getting in the Carbs

Baja 252

Baja 252

Location
LOTO
We have a couple skis that have pod flame arrestors and they get too much water into the carbs. I need to fix this and find a way to keep water out of the carbs. Before someone asks, Yes hood seals are tight, no hull leaks and we have bilge pumps and big ball valves in the skis. These are freestyle skis and getting water into the hull and the carbs during a routine is just the way it is.

I'm thinking of trying a modified stock Yamaha flame arrestors set-up because I think they would keep a lot of water that must splash around inside the hull from getting in the carbs I would modify the base to fit my carbs if necessary, remove all the screens and add another opening in the back of the box like the stock one that's in front. Then depending on the room I have, I'd try to fit another rubber 90 degree bent tube like the front side has.

Has anyone tried this? Did it flow enough air for a 1100cc engine and work well?
 
Christian_83

Christian_83

Xscream
Location
Denmark
It will flow enough air with OEM box. You could also use the 61X single type flame arrester on both carbs. There is several options for this out there.
I thought about making some low OEM style AM flame arrester, but haven't had the time to pursue it.
 
Pro-pulsion

Pro-pulsion

Location
Ontario, Canada
I run aftermarket arrestors and rarely have a water ingestion issue. What I did find however when I would experience water related carb issues was the tempterature of the engine and pipe. I am currently running a B-pipe, when setting it up I had the pipe running too dry. The chamber got so hot it made a contact melt into the gas tank. The point is, the carbs would foam up in the top side a lot because the water hitting the chamber would vaporize and be drawn into the carbs where it would rapidly cool with the fuel charge and turn into oil foam. I have since recalibrated the water screws to cool things just a touch more and have not had the issue return. It may be worth while to check on how hot your engine combo is running before considering the OEM airbox. I can say when I ran the OEM box I found that it held my engine back a little. It didn't flow quite as nicely as my OceanPro Vortex arrestors do, but also if you leave the rubber elbow in the stock position (it has the little alignment notch), it aims the elbow too low and close to the battery side (on a SuperJet). For me, it acted like a shovel and scooped water in when the ski was laid on the battery side. I re-positioned it to aim more toward the center/left engine mount with much better results.
 
iQRTurbo

iQRTurbo

Here is a good setup that we have gone back to, done with pod filters. Guess the OEM’s must have done their homework... Don’t drill any holes in the back, the water gets splashed up the bulkhead and up the sidewalls of the hull and water following the walls will get sucked right in. Pulling the air from the center of the engine bay will be the driest assuming your not full of steam in there. Just pull two of the screens out and the one layer will hopefully catch anything that may be bouncing around if some fasteners come loose. Cutting some of the opening higher to clear the larger cylinder heads may be required to unshroud the intake area.
 

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Baja 252

Baja 252

Location
LOTO
iQRTurbo said:
Here is a good setup that we have gone back to, done with pod filters. Guess the OEM’s must have done their homework... Don’t drill any holes in the back, the water gets splashed up the bulkhead and up the sidewalls of the hull and water following the walls will get sucked right in. Pulling the air from the center of the engine bay will be the driest assuming your not full of steam in there. Just pull two of the screens out and the one layer will hopefully catch anything that may be bouncing around if some fasteners come loose. Cutting some of the opening higher to clear the larger cylinder heads may be required to unshroud the intake area.
Click to expand...

Good info, thanks. Makes sense to pull air from the center of the hull. I was just worried the stock elbow wouldn't flow enough air to feed my two 48mm carbs.
I'm going to look into the 61X single flame arrestors. What carbs are you running, I'm wondering if you had to modify the base for aftermarket carbs?
 
Mdavies_02

Mdavies_02

Location
Stouffville, Ontario
Baja 252 said:
Good info, thanks. Makes sense to pull air from the center of the hull. I was just worried the stock elbow wouldn't flow enough air to feed my two 48mm carbs.
I'm going to look into the 61X single flame arrestors. What carbs are you running, I'm wondering if you had to modify the base for aftermarket carbs?
Click to expand...

X2. How would you mount a OEM 44mm adapter for Novi 48's?
 
Roseand

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
iQRTurbo said:
Here is a good setup that we have gone back to, done with pod filters. Guess the OEM’s must have done their homework... Don’t drill any holes in the back, the water gets splashed up the bulkhead and up the sidewalls of the hull and water following the walls will get sucked right in. Pulling the air from the center of the engine bay will be the driest assuming your not full of steam in there. Just pull two of the screens out and the one layer will hopefully catch anything that may be bouncing around if some fasteners come loose. Cutting some of the opening higher to clear the larger cylinder heads may be required to unshroud the intake area.
Click to expand...
What size engines have you tried them on?
 
J

Jrm1200

In the same situation looking for adapters to fit stock box(es) on 48mm carbs. I emailed freeriderz inc today and was told the Fibox system is currently on a manufacturing hold.
 
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