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Mercury 496 Mag trouble, need help

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Old 08-11-2015, 01:56 PM
  #11  
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I am not trying to throw anything way above anyone heads here. This cam sensor has become a big problem in the last 3 or 5 years. I found this out the year the sensor was NLA and the cam gear reluctor was way different so I knew something was up trying to fix a 496 that the newer cam sensor was installed and the engine ran even worse.

Anyways not dogging LOTO but I am amazed how many boat shops are in the area that have no or never taken any OEM factory training and are loaded with current OEM marine engines to repair. I am not saying all the shops in your area have no OEm insight or training but there is a fair share of them.

Anyways I am pretty darn sure I can fix your boat and possible up here or over the phone not even putting a hand on it. Your serial number falls under the NLA cam sensor and you need the proper one to make it run correctly. Just saying.

I would be willing to let you try one of my cam sensors if it works I will have to charge you for it. If it does not work I will want back. I put up some upfront money to have these done. Someday as a hope to be the easy fix for many 496's and I am the go to person for this.

Last edited by BUP; 08-11-2015 at 01:59 PM.
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Old 08-11-2015, 02:11 PM
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I am willing to try your product. What kind of price will you charge if it works? We can also talk via email, [email protected] or phone or text 816-686-7530.
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Old 08-11-2015, 03:25 PM
  #13  
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Way under 200 bucks and we will need to use a current connector as well they are around 20 bucks. we need to splice that per OEM recommendations. Not hard at all just wondering about access for your app. I was thinking about coming to LOTO for the shootout anyways. I will contact you today or tonite if that's OK. I am OEM Cert just incase you are wondering about how I know this stuff and or where I coming from with the info. I have worked on my fair share of 496's In my day.
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Old 08-15-2015, 01:34 PM
  #14  
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Text days ago and nothing back from you so what has come forth with this ? Like I said I had 10 CAM sensor made but have not had an app around my area to even test them. Looking to move forward with my CAM sensors for the early 496 apps. Wish I could find a 2500 496 early truck app and a RV to see how well or not these work in those apps to. Just saying
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Old 08-09-2017, 05:12 PM
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Default 496 Mag

I'd be interested in talking about this cam sensor.
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Old 06-18-2020, 12:57 PM
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I would like to know if you still are making the Cam Pos Sensor for the 8.1 (496) Mercruiser
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Old 06-18-2020, 01:10 PM
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The sensor depends on which 496 you have

From BUP
2001 - Standard PC948, GM 12575182 NLA, Merc 883513 NLA, Block 1XA, 1XW
2002-2003 - GM 12575183, Standard PC 949, Merc 881666 NLA, Block 2XA, 2XW, 3XA, 3XW
2004+ - GM 12591720, Standard PC260, AC 2133826, Merc 892615002, Block 4XA 0M667238 & up, Block 4XW 0M672041 & up
CDI E13-0004. OEM#: Mercruiser 892615, 892615001, 892615002, Pleasurecraft R020035A
Replaces Part#: Mallory 9-29821 Sierra 18-7646

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Old 06-18-2020, 02:34 PM
  #18  
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Hey Alldodge, some reason the nla cam sensor for 2001’s coming up available as

ACDelco 19338600

is this now right ?
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Old 06-18-2020, 04:12 PM
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Agree, looked up Standard PC948, GM 12575182 and they show up the 19338600, I'll add it to my list

MUC at iboats said the following

The crank sensors had a few designs, one o-ring, two o-ring and I think a couple of different colors. But they would all work in any 8.1 block. If you look up the part number for the earliest Volvo or MerCruiser crank sensor you will find they supersede to the latest number.
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Old 06-19-2020, 01:37 PM
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Originally Posted by AllDodge
The sensor depends on which 496 you have

From BUP
2001 - Standard PC948, GM 12575182 NLA, Merc 883513 NLA, Block 1XA, 1XW
2002-2003 - GM 12575183, Standard PC 949, Merc 881666 NLA, Block 2XA, 2XW, 3XA, 3XW
2004+ - GM 12591720, Standard PC260, AC 2133826, Merc 892615002, Block 4XA 0M667238 & up, Block 4XW 0M672041 & up
CDI E13-0004. OEM#: Mercruiser 892615, 892615001, 892615002, Pleasurecraft R020035A
Replaces Part#: Mallory 9-29821 Sierra 18-7646
According to Sea Ray my block numbers are 101XYT1
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