O2 sensor in a water cooled manifold

[HorizonblueDK]

I have just installed an AEM wideband O2 gauge with a Bosch sensor in my car. The instructions for this, was the keep the sensor 18 inches away from the(nearest) exhaust port, and at least an angle of 12°(tip pointing downwards). Probably so moisture can drip off. When installing an O2 sensor in our water cooled manifolds, both of these criteria seems to be hard to match. When going 18 inch away from the nearest exhaust port, we are almost out where the water is mixed with exhaust. And with the "O2 sandwich plate" between manifold and riser, the sensor is mounted horizontal. Well, maybe at an angle if the boat is heavy astern

So my question is: where exactely has people mounted an O2 sensor in their manifolds, which has proved to work over a longer period?

 

[HorizonblueDK]

Could a moderator please move this thread to the "Non repair I/O and inboard" forum ?

 

[Scott Danforth]

what benefits are you attempting to get with a wite band in a boat. 99% of the time, the motor is in open loop mode, untill recently when EPA mandated higher emissions and the motors were fitted with cats

 

[HorizonblueDK]

I have two runabouts (17 & 18 feet) and would like to replace the carb setup with EFI on at least one of them. It's probably going to be more or less home made, with a programmable ECU. I'm not planning on buying a complete (secondhand) setup from Volvo. So to make the fine tuning of the engine easier, I need the O2 sensor.

 

[UncleWillie]

I am going to guess that you will need to buy a manifold that is designed to accept the O2 sensor.
You will need to mount it on the Inner liner of the manifold.
If you just drill a hole in a manifold you are going to hit the water jacket first and then the inner liner before you reach the exhaust stream.
The inner liner of the manifold is water cooled so the O2 sensor is not going to get up to full temperature without some form of insulation.
The addition of the sensor is not going to be a trivial modification.

I would at least look at a 2012 or later manifold to see how/where they placed the sensor if you are determined to make it a DIY job.