Toyota Nanni Diesels are they any good?

Bill, before you pop for an off brand take a look at the Cummins ReMan in 330 HP for about the same price.
Cummins moved their entire line to Mexico when the 5.9 was no longer EPA approved for new installations.
They make band new engines marked REMAN only for repowers, which EPA allows for boats built before Jan 1 2000. With a quick Google of Cummins marine Reman I found a bunch of them priced from 15K to 19K all with Cummins 2000 hour warranties.
The upside is that parts are readily available and there are lots of mechanics that know them well.
 
Don't forget the genset. I looked at going from gas to diesel in a 40 foot SR several years ago. I really liked the boat but it was cost prohibitive, somewhere around 100k, after all was said and done with Cummins power. Not saying it can't be done but figure your estimate plus 20%.
 
quote:
Originally posted by GSENT

nanni diesels are an excellent choice. I know of two boats with them, and they have thousands of hours on them. Many boat owners have their older boats retrofitted with these, especially single engine trawlers and sailboats. Selling dealer is Waterway Power in Annapolis, Md. 1-800-286-8758. they have a booth every year at the power boat show.

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This was the company I talked to at the AC Boat show.
Bill
 
quote:
Originally posted by DDL

Don't forget the genset. I looked at going from gas to diesel in a 40 foot SR several years ago. I really liked the boat but it was cost prohibitive, somewhere around 100k, after all was said and done with Cummins power. Not saying it can't be done but figure your estimate plus 20%.

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I haven't forgot the generator. In fact I would feel safer with a diesel genset.
Bill
 
quote:
Originally posted by Gregory Saracco

Bill, are you sure that's a transferrable warranty on your 8.1s? Lots of these engine warranties only apply to the original owner.

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100% positive the warranties are direct from Mercruiser and the policy on each engine and transmission says it can be transfered for a $50.00 administrative fee.
Bill
 
Gary I haven't seen a Cummins with 300hp that will fit in my ER. I have limited height.
For the other poster the ER is under my cockpit (Walter V drives) and there is more than enough passive ventilation for what I would call medium sized diesels.
Bill
 
Bill
I your going down the diesel path join boatdiesel com for the $25.00

There are many repower threads, one I found for a Bert 31 repower: Cummins or Yanmar

B 31 FBC: C or Y? I am comparing QSB 330 vs. 6LPA-STP (315) in my re-power. The Cummins seems to have fewer parts and arguably better designed. The Yanmar is smaller, easier fitting and weighs less, 996 lbs with gear vs. 1,415 lbs for the QSB with gear. Maybe this is why the Yanmar B 31 seems faster than the QSB? Am I missing anything else important when comparing these 2 engines?
Is there precise fuel flow data with the Y 315? The graph on Yanmar's website is too vague for clear comparison to the QSB.
What is the price difference with ZF gears between the QSB and LP 315?
Thanks for any help. Joe
http://boatdiesel.com/Forums/Thread.cfm?CFAPP=30&Forum_ID=230&Thread_ID=21626
 
I second that,
That website has been a wealth of knowledge for me as a Yanmar 6LP owner. We have also been quite pleased with local Yanmar support company; Mack Boring & Parts Company. Not sure if they are in your area though.
Best of luck with your conversion!
 
quote:
Originally posted by abalmuth

Bill
I your going down the diesel path join boatdiesel com for the $25.00

There are many repower threads, one I found for a Bert 31 repower: Cummins or Yanmar

B 31 FBC: C or Y? I am comparing QSB 330 vs. 6LPA-STP (315) in my re-power. The Cummins seems to have fewer parts and arguably better designed. The Yanmar is smaller, easier fitting and weighs less, 996 lbs with gear vs. 1,415 lbs for the QSB with gear. Maybe this is why the Yanmar B 31 seems faster than the QSB? Am I missing anything else important when comparing these 2 engines?
Is there precise fuel flow data with the Y 315? The graph on Yanmar's website is too vague for clear comparison to the QSB.
What is the price difference with ZF gears between the QSB and LP 315?
Thanks for any help. Joe
http://boatdiesel.com/Forums/Thread.cfm?CFAPP=30&Forum_ID=230&Thread_ID=21626

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The additional weight of the QSB and drive would make my vessel unsafe in my opinion. I have already installed an insulated hardtop on her and a custom arch. My boat is a Vee drive boat so everything is under the cockpit. I have also added about 600lbs of additional battery weight between the house bank 3-8D AGMs, larger (3-31 series AGMs) starting batteries.
 
I don't know about the Cummins, but the Yanmar 6LP IS NOT a common rail engine.

Purely mechanical injection with an electric fuel pump.

NO ELECTRIONICS EXPOSED TO SALT & MOISTURE TO FAIL.

Also, this engine was updated in 2008? to meet new emissions regs.

Do some investigation as to whether you want one built before that change or after, as I believe that the torque curve may be different, but I'm notsure.

RWS
 
If your engine room is setup properly, you shouldn't have to worry about salt coming in.

I have no salt residue in my engine room at all, so I'm not sure if that the item to watch out for.

I like the re-man program Cummins has.
 
Well it looks like Yanmar makes a 6LY with a bolt on V drive and they have done many 40 Mainship Sedan Bridges. The motor was an option for my boat. Unfortunately I am going to loose my all digital / glass dash.I am almost certain that is the route I will be going. I should know in a few days. Bill
 
Don't rule out Steyr. They are a large player in the conversion market.
 
RWS is correct some of the newer electronic engines have a flat torque curve. The electronic controls offer some amazing results and features. I dont know yanmars status in electronic control though.
 
Bill,

the LY might be a better choice for your size vessel.

Have the yard run the calculations based on waterline length and the othe formulas and then talk with owners of same vessel with that power combo.

That will be revealing and help with your decision.

By the way, with the 6LP and the right wriring harness work you can use all the factory guages for the gas burners except for the tachs.

RWS
 
quote:
Originally posted by RWS

Bill,

the LY might be a better choice for your size vessel.

Have the yard run the calculations based on waterline length and the othe formulas and then talk with owners of same vessel with that power combo.

That will be revealing and help with your decision.

By the way, with the 6LP and the right wriring harness work you can use all the factory guages for the gas burners except for the tachs.

RWS

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Thanks for the tip on the LY. However I have a no ANALOG gauge dash. Everthing that monitored both engines was done with 2 System View 5000 digital displays that only works on Mercs or some Cummings (QSBs). So which ever I get my custom helm needs to be redone.
As far as the Styer I have read that they really don't have a removable head or head gasket that and they only have 3 dealers in the US the closest to me is Florida over 1200 miles away.
Bill
 
I didn't realize my 8.1L HOs were almost 1200lbs per side that is without the huge V drives. I am researching the QSB5.9 305hp with a ZV63 which would replace my V drives and still allow me to use my SmartCraft system view 5000 displays. I am not going to make the mistake I made last time by rushing to install the current configuration. It looks like it is between the QSB5.9 (305hp) and the Yanmar 315LYs at this point but I will have more information by early next week. I talk with the Marina today and yes we will be reinforcing the stringers as mentioned above.
Bill
 
Bill, The stringer mods were not necessary for us, but I wanted a litle overkill and got it.

If you spec the Yanmar 6LP, and choose to use Raycor filter systems, make sure the yard specs the 900 and not the 500.

The LP runs a great deal of fuel through the system and back through the return line. This is done to keep the injector pump cool through heat transfer. It also makes for a nice fuel polishing system while underway. Just keep in mind that the fuel burn rate GPM is much lower than the GPM being pumped through the system.

I can't help you on th edigital monitoring system. Don't know what is compatible.

My choices were limited by height constraints to the Yanmar 6LP and the Volvo 310 HP engine.

The Volvo had a significant amount of electronic devices attached and my research indicated that there was a failure rate related to those components either by intermitent connections due to corossion or the failure of a component. Diagnossis of the failed part also seemed to be a problem, as well as getting the proper replacement parts.

On a boat where things can be exposed to high humidity, salt air, moisture and a variety of other issues I really like the idea of the 6LP's mechanical injection system. Less items to fail. Although earlier LP units had a problem with valve stem seals and failures related to overpropping, I still felt more comfortable with the Yanmar.

RWS
 
RWS That is pretty much my limiting factor height. Does your boat have the engines under the cockpit?
Bill
 
They are under the cockpit.

Adding a down-angle trans allowed the Yanmars (or the volvos) to fit.

The front of these engines aets back about 4" fom where the 454's were.

Also, these are not as wide as the old V-8's were.

Much easier to get around the engine room on all sides (except the top, in which case I have to remove the cockpit seating and lift the outboard hatches.

I installed an oil change system, makes servicing a breeze!

And cleaner too!

When you negotiate our engine purchase, have them throw in a set of spares for eachengine belts, impellers, filters and zincs. I buy my filters at NAPA as they are the same number as thos used in the Toyota land cruiser. Just to b safe, you probably should use the Yanmar filters while you are under warranty.

I would also suggest setting up your raw water intake system with the necessary valves and fittings for a fresh water flush AND a pair of crash pumps. The cost is pennies while you are doing the refit.

RWS
 
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