sensor AFR

[1tommygunner1927]

Hi guys, I have a big problem with the AFR sensor, to make 2 logs I had to use 2 new sensors, why do they break so fast? I can't even complete the log. Do you have any secrets to lengthen the life of the sensors? Thank you

The Bosch 4.2 sensor does not last as long as the Bosch 4.9 sensor, but both will fail due to high exhaust temps in excess of 900*C. The other item that will kill an O2 sensor is moisture/water.

Inspect exhaust manifold for cracks around the O2 sensor, or it wasn't drilled/threaded correctly, breaking into the water jacket.

[Green Hulk]

Jerry,

With this Riva plate wouldn't it mainly be reading the AFR's for that one cylinder and not the others?

Yes, but on Sea Doo ECU all cylinders are fueled the same.

[Jkmike]

Yes, the Riva exhaust race plate spacer will solve this issue, and you can optionally use it for EGT's as well.


RIVA Sea-Doo Exhaust Race Plate

RS18050-ERPOur Exhaust Race Plate increases engine rpm (75-150rpm) resulting in more top speed (1-2mph) with correct tuning. The CNC machined T6 billet aluminum spacer installs seamlessly between exhaust manifold and cylinder head. Includes threaded ports for easy installation for EGT sensor in each exhaust po...
$139.95
Add To Cart

Jerry,

With this Riva plate wouldn't it mainly be reading the AFR's for that one cylinder and not the others?

[Jkmike]

Heat-Sink Bung Extender (HBX-1) (innovatemotorsports.com)

Amazon.com: Innovate Motorsports 3729 Heat-Sink Bung Extender HBX-1 : Automotive

I use this in mine and it definitely helps with sensor longevity.

[mittens]

Dove posso comprare questo?

Heat-Sink Bung Extender (HBX-1) (innovatemotorsports.com)

Amazon.com: Innovate Motorsports 3729 Heat-Sink Bung Extender HBX-1 : Automotive

[samui]

Dove posso comprare questo?

[mittens]

You can also use a 02 sheet sink. It helps keep water off the sensor

[Green Hulk]

Resolution problem, I have a water leak where we made the thread, shit I ruined 200€ of sensors. Has anyone used thick Riva exhaust with hole for O2? Thanks everyone for the replies.

Yes, the Riva exhaust race plate spacer will solve this issue, and you can optionally use it for EGT's as well.


RIVA Sea-Doo Exhaust Race Plate

RS18050-ERPOur Exhaust Race Plate increases engine rpm (75-150rpm) resulting in more top speed (1-2mph) with correct tuning. The CNC machined T6 billet aluminum spacer installs seamlessly between exhaust manifold and cylinder head. Includes threaded ports for easy installation for EGT sensor in each exhaust po...
$139.95
Add To Cart

[samui]

Resolution problem, I have a water leak where we made the thread, shit I ruined 200€ of sensors. Has anyone used thick Riva exhaust with hole for O2? Thanks everyone for the replies.

[ptscon]

You don't want a hot sensor before you start the engine. Doing this will dump moisture onto the, now hot, ceramic element inside the senor damaging it. Ideally you would start the engine, which will clear our any moisture, and then quickly turn on the heater.

[moparguy]

The only thing I do differently, is I don't remove the 02 after logging. It then gets plugged back into dashpac, maybe you just got 2 duds. Have you tried sourcing a O2 from another supplier/retailer?

[samui]

thanks for the reply, I always heat first, when I finish I ski out of the water with the engine running, I empty the drain and spend and remove immediately

[samui]

grazie per la rispopsta, io scaldo sempre prima , quando finisco esco ski da acqua con motore acceso svuoto scarico e spengo e rimuovo subito

[moparguy]

Hi guys, I have a big problem with the AFR sensor, to make 2 logs I had to use 2 new sensors, why do they break so fast? I can't even complete the log. Do you have any secrets to lengthen the life of the sensors? Thank you

Preheat the sensor, before starting ski.

[samui]

Hi guys, I have a big problem with the AFR sensor, to make 2 logs I had to use 2 new sensors, why do they break so fast? I can't even complete the log. Do you have any secrets to lengthen the life of the sensors? Thank you