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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  #1  
Old 02-27-2013
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To Serpentine or not to Serpentine (BETA)

I am in the process of repowering my new to me 1980 Clearwater Offshore Kat Ketch 33. Current power plant is a taken part, worked on by several people and never ran again Universal 5416.

I looked at the offereing from Yanmar but really liked the way everything that I needed to touch on a frequent basis was located on the front of the Beta and the east coast distributor is two hours up the road. Price wise they are pretty much the same within a couple boat dimes. Engine acces from the either side is limited on my boat.

So now I am puzzling through the options, do I need a 70 amp alternator or is the 40 sufficient? How about the serpentine belt? It's a $246.00 option that is required for the 70 amp alternator but simply an option for the stock 40 amp.

I think the serpentine belt will have less potential slippage since it should use an idler pulley and may result in a better bearing life for the alternator and water pumps.

Electrrical loads are pressurized water, refrigeration, lighting and basic instruments. I have two banks of house batteries and a battery reserved for starting the engine. I may add a/c down the road but that would be for use at the dock only so it shouldn't figure into the dc loads.

I like the b panel upgrade (temp and RPM) at $180 but don't think I need to go with a c panel (temp, volts and rpm) becasue I can monitor voltage on the power panel in the cabin.

Open to hear anyones thoughts and ideas on these options.
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  #2  
Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

A serpentine option for $246.00 is a no brainer in my book. To me it is one of the best options to spring for and a steal at that price. Aftermarket serpentine kits cost $700.00 to $1000.00 and are not as nice as a factory made kit...

A 40A alternator on anything but a dock stored day sailor is awfully small.. How big is your house battery bank and why are they split in two?
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

If starting from scratch, I'm just a fan of having as many amps as practical. Penny wise and pound foolish, if you were to learn later that you needed/wanted the upgrade.

There is a break point in alt size where you either need two v-belts or a serpentine. I like the serpentine, and it would permit you to more easily upgrade even further, if that was necessary. Always keep a spare belt, as they have a tendency to break without ever looking worn, Better yet, change it on a regular interval, regardless of condition.
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

Serpentine, no question.
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

I agree with your choice of the Beta Marine engine.

Note that many (most? /all?) Beta Marine Engines are "marin-ized" Kubota Diesels.

You may not know that the Universal 5416 shares some history with the Beta engine;
Quote:
In 1976 the first Universal diesel was introduced. Designated the Model 5416, it was a 45 cu in, 16 hp, 2 cylinder, fresh-water-cooled engine producing 16 hp @ ? rpm (intermittent), based on the Kubota Z-751 block and fitted with a Hurth HBW-50 marine transmission. It was built from 1976 to 1982. Approximately 1,000 were sold.
- From History of the Universal Motor Company

I will also chime in that the higher amperage alternator, and the serpentine belt, are no-brain decisions if you plan to cruise.

[EDIT]: I would look through their options to find if an Oil Pressure gauge can be added to either panel. If not, I would get the panel with the volt meter, and swap it for an oil pressure gauge. IMHO, understanding what the oil pressure reading is at any moment, and correlating this to RPM and temp, is more important than knowing the voltage of your electrical system.
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Last edited by eherlihy; 02-27-2013 at 01:26 PM. Reason: added opinion on Oil Pressure
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

Spring for the type C panel;
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

Go big, you can easily have too little electric power making ability on a boat, you can never have too much.
I've priced kits, $246 is a steal for the better wheel.

Ditto on the better panel, you can have too little info, but seldom too much. Is there not a temp volt and oil pressure option?

edit - eh got me, go with a type C, it's worth it. Oil pressure drops can kill an engine.
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Last edited by chucklesR; 02-27-2013 at 01:38 PM.
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

Go serpentine. Another benefit is a significant reduction in belt dust, boy do I hate belt dust.
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Old 02-27-2013
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Re: To Serpentine or not to Serpentine (BETA)

Thanks to all for your replies.

Stan at Beta performed a propeller calculation and found the boat is under-powered with the current motor. Upgrading to a new Beta 16 will still leave me almost one knot shy of hull speed. The local rep will see if the Beta 25 with a 100 amp alternator will fit.

I plan to use the boat for cruising so my main loads will be the refrigerator compressor and auto pilot.

My current plan is to have the existing motor pulled so I can clean and paint the engine space and rework my fuel lines and electrical wiring. Working 6x12 on nights the next two months so I don't have a lot of free time.

Lots of mystery wires and other things that were installed with a lack of common sense.

This bnoat needs a lot of love, my first project was to clean the lazarette, the exhaust elbow had a leak and coated everything with diesel particulate and saltwater spray, you could not get near anything back there without being covered in black soot.
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Old 03-01-2013
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Re: To Serpentine or not to Serpentine (BETA)

Kat sailor, I repowered 2 yrs ago, with a beta 35HP 100 amp, which comes wf the serpintine belt, I chose the ABVW waterproof panel with tach, warning lites and buzzers. Another option I went for was the high rise SS exhaust elbow. I did the install and I am very happy with this engine. I had a tangle of wires hoses, a real mess, I removed it all. You are correct, this is the time to clean clean, paint, and look at sound proofing. I think one of the best things I installed was a 24" florescent light. Mine is a center cockpit with a 65" shaft, my dealer gave me plan to make a small plywood engine template and and as I had to cut down my engine beds approx 2" it was a huge help. see pics for shaft align...Good luck any ?? ask away I learned ton doing this job. I will post pic seperatly can't do in quick post... Red
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