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Author Topic:   Bilge Pump Fuse Location on 150 MONTAUK
john7548 posted 05-02-2010 12:24 AM ET (US)   Profile for john7548   Send Email to john7548  
I bought a 2008 150 Montauk and have only had the opportunity to use it once. When I purchased the boat the owner told me there was a problem with the Attwood Sahara 500 bilge pump. I was in San Diego a couple of weeks ago and purchase a new Rule 750 automatic pump. I worked my way through adapting the base so I wouldn't have drill any new holes but have encountered to other problems. My wiring diagram shows a 2-ampere fuse and the new pump calls for a 5-ampere fuse. Today I crawled down into the console area and, for whatever reason, cannot find that fuse. I took out of the main breaker box where the reset button is located but found no fuse cartridge. In the battery and console area I did locate all the other fuse cartridges but not one for the bilge pump. That said, I'm a big guy and this space isn't made for someone like me, so I didn't look in extreme detail. Does this fuse exist? If so, where it is? I'm not sure it matters but this Boston Whaler is equipped with a live well. I did get the new bilge pump working but it won't work in the automatic mode. I have more things I can try for this, so I'm not sure I need help in that area. I would like to put the larger 5-ampere fuse in place of the 2-ampere fuse that is suppose to be someplace between the bilge pump breaker box and the battery. Any help would be appreciated.
jimh posted 05-02-2010 08:30 AM ET (US)     Profile for jimh  Send Email to jimh     
The wiring diagram is available on-line: pdf

The branch circuit that feeds the sump pump is protected by a 2-ampere fuse or circuit breaker in the "breaker box" that also contains the main 30-ampere fuse or circuit breaker.

The location of the breaker box is shown in this drawing: pdf

john7548 posted 05-02-2010 11:41 AM ET (US)     Profile for john7548  Send Email to john7548     

I appreciate your reply. I have that wiring diagram but did not have the location drawing you linked. Perhaps I'm confused about the "breaker box"...I will go in again this morning. My thinking was that the "breaker box" is the black box that is attached by four screws inside the console...It is labeled "bilge pump" and "main dc"...from that box is two reset buttons...When I removed that box there we neither the 2 amp bilge pump fuse or the 30 am main dc fuse...So I must be looking in the wrong place. As I wrote yesterday...I was trying to find this fuse without getting too involved. This morning I will remove the battery and crawl into this area the best I can...I'll have to have my wife vaseline my body to make sure I can get back out....Apparently the box I removed is not the breaker box....I'll let you know what I find. Thank you.

jimh posted 05-02-2010 11:47 AM ET (US)     Profile for jimh  Send Email to jimh     
Based on your narrative, you have found the breaker box. There are no fuses in the breaker box. There are circuit breakers in the breaker box. The circuit breaker for the sump pump is a 2-ampere circuit breaker, according to the wiring diagram. If you want to replace it with a 5-ampere fuse, you will have to undertake a modification of the installation. It might be simpler to replace the 2-ampere circuit breaker with a circuit breaker of the same type but with a 5-ampere rating.
john7548 posted 05-02-2010 01:38 PM ET (US)     Profile for john7548  Send Email to john7548     

That is correct..there are two circuit breakers in the box which can be reset. I also think you are correct in that it would be easiest to just replace the 2 amp circuit breaker with a 5 amp circuit breaker. Actually the bildge pump circuit breaker which is shown as 2 amp on the wiring diagram may already be a 5 amp cirucit breaker...The only thing that looked like a rating on that circuit least that I that it has the number and letter 5A in big printing...I'm going to open that box again and take a closer look. Thank you.

jimh posted 05-02-2010 02:06 PM ET (US)     Profile for jimh  Send Email to jimh     
If the reset button on the circuit breaker shows the legend "5" or "5A" you can be reasonably confident that the current rating of the device is 5-amperes. However, in some cases the device is mounted so the legend is inverted, and you have to take that into account. It might actually be marked "2" and appear at a glance to be a "5."
john7548 posted 05-02-2010 02:25 PM ET (US)     Profile for john7548  Send Email to john7548     

The circuit breaker is a E-T-A Series 1658. When I visited the E-T-A website the stated smallest amps for that circuit breaker is 5 amps....So I'm putting this concern to bed and moving on to why the automatic bilge pump feature is not working. I really appreciate your help. I'm relatively new to the boating business but for sure there is no way a boat shop can hire a mechanic that weights over 150 pounds...That must be the job that retired Jockeys move too...Again thank you.

jimh posted 05-02-2010 05:55 PM ET (US)     Profile for jimh  Send Email to jimh     
John--When Boston Whaler assembles the console and wiring, they do it before the console is installed on the hull. They have work fixtures that position the console at a convenient height and orientation so the wiring can be easily installed by the assembly technician. You'll notice that there often is a connector used to connect the wiring harness from the stern to the wiring in the console. That's because they are assembled separately and then joined together when the hull is being finished off.

Now once that console gets installed on a boat, working on it becomes a different story.

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