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    Balmar & CMI alternator upgrade

    By
    Ludovic Francois
    -
    0

    Parts ordering & delivery

    Tired to have to replace my belts twice a season, I decided it was time to fix this recurring alternator belt issue. The PO installed an alternator too big for my M25XPB engine. So after some research and a lot of help from Mainsail on Catalina 36 forum and on https://marinehowto.com I decided it was time to start with this project!

    Pulled the trigger and I bought a Balmar regulator MC-614H and an alternator CMI-105-ER on https://marinehowto.com/.

    • CMI-105-ER – 105A Motorola/Prestolite/ Leece-Neville Externally Regulated Alternator
    • Balmar Regulator MC-614H
    • ​​Balmar MC-TS-A Alternator Temperature Sensor

    Very happy with Rod customer service during the decision process and the very fast delivery.

    Replacing old with new!

    Where do I put the mc-614 regulator?

    As soon as I received all parts, the first question was to decide where to put the regulator. I decided to take advantage of the space available on aft of the engine, against the central water tank. Another option was to put the regulator on the port side of the engine bulkhead.

    CMI Alternator fitting issue?

    As soon as the regulator situation was fixed, I realized the alternator didn’t fit as expected. Time for a quick conversation with Rod @ marine how-to, I can’t say enough how helpful Rod has been in the success of this project). Rod explained me I was able to make one of the alternator bolt shorter, 30 seconds with the dremel and I was good for the next step!

    Alternator adjustable arm grinding

    Next issue 🙂 After a quick grinding, it fits perfectly!

    Broken bolt 🙁

    Almost too easy! The alternator arm decided to break inside the engine block, after some clean up and rethreading, I was able to get a new bolt in.

    Back on track. Let’s wire!

    Maintenance switch?

    Negative bus bar setup

    Which belt?

    After few tests, it looks like the 17420 is a good fit! Time to order a couple of them for spare.

    Ready for testing?

    Configure the Balmar mc-614

    The tuning of the Balmar MC-614 is pretty challenging, I just followed RC recommendations for your alternator and your battery. You can find everything about Balmar Tuning in the article below.

    Programming a Balmar External Voltage Regulator

    Why no RPM?

    Checking the RPM, I realized it was not showing up, after a bit more help from Rod I started a quick troubleshooting session to realize one fuse failed during the setup.

    Troubleshooting

    5 days cruise update

    The week-end of Thanksgiving was a perfect time to validate the new alternator setup. Everything worked as expected! Next step upgrade our battery bank for our next long cruise to Catalina.

    Galley and Head LED lights update

    By
    Ludovic Francois
    -
    0

    After couple of fluorescent tube decided to stop working, we decided to upgrade the couple fixture with modern looking one.

    high water bilge pump switch replacement

    By
    Ludovic Francois
    -
    0

    On the way back from Catalina, it’s time to clean the boat after 4 days to the island. I check the bilge and realize a bit of water is there, pull up the switch to run the pump and nothing happen!

     

     

    Corroded wires, after some troubleshooting and wiring the pump to by pass the switch, I was sure the issue was the switch.

     

    Quick run to West Marine and I found the pump, of course $20 more expensive than what you can get on amazon, it was for me the first chance to try their new deal to match online price. And it works great!

    Few minutes later the new switch was plugged! It’s pretty well done and you can keep the same base, so it’s really plug and play.

    M25XPB Water pump replacement – Sherwood vs Oberdorfer

    By
    Ludovic Francois
    -
    1
    Catalina 36 - M25XPB with Oberdorfer N202M-908
    Catalina 36 - M25XPB with Oberdorfer N202M-908

    Since day 1 we own the boat, the sherwood water pump was leaking a bit, it was never the top issue but always something bothering me. In this article we are going to go through:

    1. Replacing the water pump
    2. Replacing one of the old cooling hose
    3. Touch up painting of the engine oil crankcase

    It took few hours to go through this work, but everything was pretty straight forward.

    Original state of Hotel Catalina

    Here couple of pictures from June 2016, 2 weeks after we took delivery of Hotel Catalina.

    First engine picture June 2016
    First engine picture June 2016

    First engine picture June 2016
    First engine picture June 2016

    Based on this pictures we can saw this leak has been there for a while by the rust we can see on the engine.

    Time to fix this leak and give some love to the engine!

    It has been now over 1 year we own the boat and it’s time to tackle this pump leaking and clean the rust on the engine block.

    Here are few of the options to complete this task:

    • get a rebuilt kit and fixing it (tried it, it was worse!)
    • new sherwood pump (very expensive and not so much good feedback on the different forums)
    • migrate (upgrade?) to Oberdorfer
      • Replacing with an Oberdorfer pump that has the base that goes on with the same clip system as your Sherwood pump (more expensive, but more straight forward replacement)
      • If you aren’t scared of, rework the base of the Oberdorfer bolt on pump so it bolts into the pump land on the engine (way cheaper, but a bit too involved in my mind)

    After looking online I found a very good deal on the N202M-908 at pump and parts online. Let’s go with this solution!

    Oberdorfer N202M-908
    Oberdorfer N202M-908

    Here is the invoice for the pump:

    Replacing the elbow water pump hose

    This step is unrelated to the water pump, but it was way easier to complete since the water pump was not in the way anymore.

    Old sherwood pump, old hose and old clamp. Everything will be soon replaced.

    Tried to clean and fix the sherwood water pump, but the leak was always there.
    Tried to clean and fix the sherwood water pump, but the leak was always there.

    New hose installed!

    Now time to fill the radiator with new coolant! Last time was replaced was last year during the heat exchanger failure.

    Now the hose has been replaced, let’s replace the water pump!

    The service from https://www.pumpsandpartsonline.com/about-us was very good! Few days after the order I received the part as expected.

    I was not sure about the purpose of this hole, and asked online I realized it was to make sure in case of leak of the pump, the raw water has a way to exit somewhere else than in the engine.
    I was not sure about the purpose of this hole, and asked online I realized it was to make sure in case of leak of the pump, the raw water has a way to exit somewhere else than in the engine.

    Now it’s time for some painting touch up

    It’s the first time I try that, I decided to pick white to be able to see if any leak happens in the future. The result is pretty good looking. Next time I have a chance to remove the belt, I will definitely do more painting.

    Pump installed and running!

     

     

    Temperature is good!

    Impeller replacement for my spare kit

    https://www.ebay.com/itm/112455220825

    Oberdorfer replacement impeller
    Oberdorfer replacement impeller

     

    AC circuit corroded bus bar replacement

    By
    Ludovic Francois
    -
    0

    One of the item to tackle from our purchase survey! The original bus bar for the AC circuit was corroded. It was a straight forward maintenance.

    Less of $20 bus bar from blue sea and some jumpers.

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