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Dual high output alternator mount fabrication and installation upgrades

"...ingenious Yanmar second alternator mount..."
Powerboat-world

"I would recommend the system to every Beneteau cruiser over other charging systems. I love it..."
Ross Blackman
CEO Team New Zealand and Beneteau 43 owner

Download JH4 Instruction Pack-Click Here

>>200+ Amps for that fast charge feeling!

Click here for more details and price

Basic high output alternator mount package for mechanics, marine electricians and tradesmen click here

Click here for price and availability

NEW! Yachtwork has recently finished our latest design. We now produce a forward facing large frame mount that direct couples to the Yanmar JH4 series. See the example photos to the right.

Contact Yachtwork for price and delivery times.

We have built and installed over 100 alternator systems, and many electrical systems. Scott Fratcher is a Marine Engineer and trained in Marine Electric Installations at Ocean Currents Marine Electric of Seattle.

The wiring on the alternator on the lower right is how we like to complete our jobs. Scott is known for his ability to make the final job look clean and tidy.

The first set of photos is of our latest mount that fits the new Yanmar 4JH4-TE and the 4JH4-HTE. We produce forward and reverse bracket versions.

The alternator is a LoadHandler 160 amp model for a total charge of 245 amps. This Yanmar second alternator kit is built for the Beneteau series of yachts and specifically fits the new Oceanis 46 and 50.

The next set of photos is my new 4JH4  165 amp, Delco large frame, alternator mount.  I designed this elegent mount for Yanmar New Zealand.  It fits the Beneteau 43 perfectly.  It is now one of my best selling mounts producing a combined steady 245 amps.  We even just built one for the CEO of Team New Zealand.

The blue engine is a Sole diesel that just arrived in New Zealand from Canada.  The old alternator mount had failed but needing the extra amperage John Blair called Team Yachtwork and Yanmar New Zealand.  We designed and built a whole new mount based on our top selling and highly successful 4JH4 mount.  The mount came out great and has no movement or vibration.  The owner is ecstatic and heading to the South Island with a constant 190 amps showing on battery monitor.

The next set of photos is an dual alternator on a Yanmar 3GM30. The 3GM30 is an especially difficult engine to add a second alternator onto. In this case we used a self adjusting Love Joy self tensioning swing arm. This special arm is a one time adjustment at the installation of a new belt. From that point on the belt and adjustment should never need any more attention.

If we can't install a Love Joy tensioning arm then we use a turn buckle swing arm adjustment. Scott tries to get one or the other of each of these special belt adjusters into each installation. Many boat owners with difficult to adjust belts have just this single addition put onto there already installed alternator system.

The lower photos are examples of a 4LH and a 3JH3.  Both systems produce over 200 continuous amps.  I designed the mount for the 4LH for Yanmar New Zealand and the 3JH3 mount was built for a customer through Team Yachtwork.

Click here for more details and price

Our customers rave about this high quality product. It ends the issue of charging batteries

"I would recommend the system to every Beneteau cruiser over other charging systems. I love it...
We use all the power we want including a 600w inverter for laptops, battery drill, camera etc and have never been below 700amps in batteries.
No doubt your kit was one of our best investments and the price was perfect at the time. Your kit and instructions were incredible..."

Ross Blackman
CEO Team New Zealand and Beneteau 43 owner

Click here for more details and price

Why so much power?

With today's high electrical usage yachts the ability to fast charge is now more important than ever. Many yachts have over a 1000 amp hour battery capacity with 1800 amp hour not being uncommon. To charge a system that large the old single high output 120 amp alternator that really puts out 90 amps can take hours to charge.

The Dual High Output Alternator system is a great option for the long range yacht. You get two big advantages with separate alternator systems.

  • First is charging time may be reduced by more than 50% (see below).

  • Second, and maybe more important is the security in knowing if an alternator fails while underway you simply turn off the switch and ignore the problem until you feel like dealing with it. Meanwhile the seconded alternator keeps merrily charging the boats electrical system.

To understand the amount of charge time you may save by installing a dual alternator system you will need to monitor your battery voltage when you start a charge cycle.

  • For this test your batteries should be about 50% discharged.

  • Start charging and notice the time, voltage, and amperage charge.

  • Wait for your voltage to rise to 14.4 volts. Note the time.

Lets say it took one hour of your three hour charge for the voltage to reach 14.4 on your lead acid batteries. The hour of charge time is what you would save right off the bat if you added sufficient charge amperage. Lead acid batteries can take about 20-25% of there amp hour capacity in charge rate. To put that another way a 1000 amp hour battery bank can be charged at about 200-250 amps.

The second big advantage of a dual alternator system is when an alternator fails (living on boats we all know what that is like) the charge system is still on line.

For example I know of many boats that have lost their alternator while underway only to have the batteries slowly go dead, with the engine still running. The wind came up but the crew could not shut down the engine as they would not be able to restart it with dead batteries. They were running at night making decisions weather to run the radar or the running lights.

If they had had a dual alternator system they would have simply noticed the problem and noted it in the log. They could have dealt with problem at their leisure in port.

Look at that (on the right bottom) 191 amps on. My personal best is 440 amps at 24 volts through two 000 cables.

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New JH4 forward mount


JH4 mount-280 amp alternator


Same strong belt adjustment system


4JH4-HTE 160Amp


4JH4 145 amp


4JH4-HTE 160Amp


4JH4-HTE 160 amps


4JH4 145 amps


Our precision mount


3GM30 alternator mount


Yanmar LH alternator mount

 

 

   
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