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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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Old 12-10-2013
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Going to need to re powersomeday..

Hello all! My girlfriend and I just purchased our first boat and we couldn't be happier! We bought a 1978 Newport 30 MKII. I knew there was issues with the volvo md7a when I bought her, so no big surprise there. I am thinking I am either going to try and rebuild it or repower. I spoke with a gentlemen the other day and he put a thought into my head but I just can't seem to figure out exactly how it would work and how much it would cost me....he suggested doing a diesel generator and electric motor. I looked into the electric motor and while I am intrigued, I just don't love the idea of doing just electric and not having a source of power like from a diesel engine or generator. What has everyone seen with doing this sort of combination instead of just a diesel engine? Just trying to get a feel of what I'll end up on doing in the next year or so...
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Old 12-10-2013
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Re: Going to need to re powersomeday..

Rob,

This is a big argument right now in the sailing community. In my eyes for very limited purposes they work fine, but have some real restrictions. Assuming you are ok with them, then there is a good argument for going electrical.

The primary concern is with the available range on battery power, the weight of the batteries, and the shore side electrical connections.

There are a few reputable suppliers, and quite a few who aren't. Make sure of who you a re doing business with before spending any money on the process.
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Old 12-10-2013
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Re: Going to need to re powersomeday..

I've gathered that there is some controversy with this subject...that's why I'm thinking of a diesel generator...recharging the batteries on board for not only lights and appliances but batteries for the electric motor...run the generator when I need to top off batteries...

There is also the idea of doing a hybrid version...but that would be if I was going to throw in another diesel motor, or rebuild the MD7A I currently have...
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Old 12-10-2013
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Re: Going to need to re powersomeday..

I think the biggest issue is what is the intended use of the boat? For ocean crossings I wouldn't consider it, for a day sailor I have already done it. For anything in between it depends.
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Old 12-10-2013
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Re: Going to need to re powersomeday..

If I were in your shoes I would definitely rebuild the existing engine. More efficient, more power, greater range, less headaches.

Good Luck,

Gary
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Old 12-10-2013
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Re: Going to need to re powersomeday..

What are the issues with the engine?
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Old 12-10-2013
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Re: Going to need to re powersomeday..

Not entirely 100% sure what the issues are...could be a couple of things. It could be an injector pump issue. It could need new seals. As of right now, I'm pretty sure it's only running off of one cylinder. I had it in SF for two weeks before I moved it further inland. It's now closer to my house and as soon as it stops being absolutely freaking cold here, I'm going to dive into the engine and troubleshoot it some more.
The reason I am even considering a repower is because Volvo parts are expensive. Ridiculously expensive. I was thinking it was an injector problem so I pulled them and had them serviced. Just in case they were completely bad, I looked at replacing them an just one injector was $600. Not cheap. If I have a bad injector pump, that's not going to be cheap. So I figured I would look into other engines/alternatives because rebuilding my MD7A could cost me just as much as purchasing a new/rebuilt motor, if not more. Just keeping my options open.
As for right now, I have my little outboard which will get me in and out of the marina just fine. But in a couple of years when I'm coastal cruising down to Mexico, my little outboard just won't cut it...
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Old 12-11-2013
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Re: Going to need to re powersomeday..

Some engines you can get parts for that are not too much money. The volvo is not one of them.

http://www.sailnet.com/forums/diesel...6-rebuild.html

Electric power with Diesel Genset is a very cool idea. It can give you a lot of options.
A good price is not one of them.
The genset will cost as much as an engine plus you have to add, electic motor, batteries and charging.

Which engines would you think twice about

Wooden boat has a write up on an electric boat repower sept/oct 2013
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Last edited by davidpm; 12-11-2013 at 12:32 AM.
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Re: Going to need to re powersomeday..

Quote:
Originally Posted by rob_d View Post
Not entirely 100% sure what the issues are...could be a couple of things. It could be an injector pump issue. It could need new seals. As of right now, I'm pretty sure it's only running off of one cylinder. I had it in SF for two weeks before I moved it further inland. It's now closer to my house and as soon as it stops being absolutely freaking cold here, I'm going to dive into the engine and troubleshoot it some more.
The reason I am even considering a repower is because Volvo parts are expensive. Ridiculously expensive. I was thinking it was an injector problem so I pulled them and had them serviced. Just in case they were completely bad, I looked at replacing them an just one injector was $600. Not cheap. If I have a bad injector pump, that's not going to be cheap. So I figured I would look into other engines/alternatives because rebuilding my MD7A could cost me just as much as purchasing a new/rebuilt motor, if not more. Just keeping my options open.
As for right now, I have my little outboard which will get me in and out of the marina just fine. But in a couple of years when I'm coastal cruising down to Mexico, my little outboard just won't cut it...
Now that your out in the 'country", perhaps a trip to the local tractor/diesel repair shop will save you a few Volvo bucks. Could be worth poking around in the back of some of those shops and see what's just laying around.
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Re: Going to need to re powersomeday..

Before you get too deep into tearing things apart, make double sure that you have changed ALL of the fuel filters.
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