Duffy Electric boats....?

Hi Ted, have a close look at the stuffing box, a mobile phone with the torch on helps, there could be a stamp in the metal telling you what size to use. It could be 3/16th or 5/16th also.

Regarding the packing material, ElectraCraft wrote (I don't know if this applies to Duffy boats):

We use 1/4" packing material for the drive shaft
We use 5/32" for the rudder packing material​

My boat had a table that we removed, anyone have suggestions for a nice looking plate to cover this hole?

Ted, you're learning through experience like the rest of us did. You just happen to have a gang of mates to help you along the way.

With Mr. Boatbuilder head on, I would pull the boat out and do a proper repair.

As a regular boat guy, Meh, I can live with that. Do it in the winter unless it gets bad. We're on a lake for heavensake.

Hi, everyone. I'm really happy I found this forum, there's some really useful information in here! And sorry for the long post.

I'm in the process of buying an inexpensive Duffy 18 foot boat (Sung Harbor I think). The boat doesn't run but the body seems to be in good shape. I'm hoping to clean it up and replace the motor, batteries (lithium) and other electrical components. I don't have any experience with this but, I'm hoping to learn and am I'm no rush.

Any advice on everything I should check before I buy the Duffy? I've already asked for registration documents and service records. Also, if I had to assume that I have to change all the electrical components on the boat (motor, controller etc) and upgrade to lithium batteries, how much should I estimate as my budget? Any recommendations for which motor to buy? And recommendations for sites or stores for all the other parts? Anything else I should think about or consider before buying the boat?



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Well, depending on the motor, battery, charger, and controller you buy, you are probably looking at between $8-$10K. You might consider checking with an electric motor shop to see if your motor can be salvaged and rebuilt. It's also possible that the controller will still be working, so I'd check that, too. These could save you considerable money, if they can be easily returned to working order.

In terms of lithium-ion batteries, they can vary greatly in price. I installed a one-piece 48V 160Ah NMC battery in my Duffy from this guy almost 2 years ago, and I've been happy with the result so far:

Hi-Powerbatteries

Good luck with the project, and please post back with your results!

Anyone have a reliable Duffy repairman in Newport Beach, CA that they could refer me to? We’ve been dealing with Duffy Boat Service for 4 months now and I just can’t take it any more. Not sure what’s going on over there, but I have zero confidence that anyone over there knows what they’re doing at this point.
Thank
Any referrals would be greatly appreciated. Thank you!

Hi everyone. I just purchased a 1990 WD Schock 18. It is definitely a project boat and I have been referring back to this thread for a lot of information. I am working on the motor and throttle control and am having trouble with the wiring. The boat has 2 sets of 3- 6volt batteries ran in series. The throttle control is a 5 position switch with neutral, slow forward and reverse, and high speed forward and reverse. From what I understand, the slow speeds run 18 volts and the fast speed use 36 volts.

I have successfully wired the throttle switch for 18 volts forward and reverse with the motor, but am having trouble with the high speed 36 volts. Does anyone have a wiring diagram, or know how to connect the second set of batteries (18 volts) to the throttle control? I have scoured the internet and contacted Duffy, with no luck.

The goal is to eventually upgrade, but for now I just want to get the boat running. Any help would be greatly appreciated.