From a repowering perspective, is a Yanmar
4JHE to 4JH3E swap a difficult proposition? My interest in the answer to the preceding question is predicated upon the following information...
My wife and I just purchased a Hunter
40 Legend sailboat that is in need of refit
. Auxiliary power for the vessel is provided by a Yanmar
4JHE; however, the boat has laid idle for a number of years (6 - 7), without maintenance
, of any kind. At my request, the marina mechanics attempted to assess the viability of the 4JHE; and, although it started easily, it immediately "ran away" and shut down about 10 seconds later.
I am told that there is a problem with the Fuel Injector Pump
(FIP); and, this problem must be resolved before any additional evaluation can be undertaken. There are no FIPs available, so an injection shop rebuild
is our only option. This is a $2,500 - $3,000 expense that would only allow us to begin our engine
evaluation. This amount also represents a significant amount of money
that could be applied toward the purchase
of a remanufactured engine
Inasmuch as the existing 4JHE has laid idle for so very long; and, inasmuch as I do not know the history
of the engine, I am seriously considering repowering, rather than exposing ourselves to a protracted, "one-piece-at-a-time" rebuild project
. Of the remanufactured Yanmar engines available, I am concerned about replacing the existing 4JHE with an identical engine. Parts
availability seems to be quite scarce for these 30 - 40 year-old engines. There are, however, several remanufactured Yanmar 4JH3E engines available, for which parts
are more readily available.
I have been told many things that "could" complicate the swap... For example, the JH3E is more compact and may require extensive engine bed
modification. I am unfamiliar with these little diesel
engines; and, I'm sure there are countless things that could complicate a swap. My interest lies in getting a compatible engine, in operational condition, without having to rebuild the boat around the new auxiliary power plant.
Your thoughts and ideas would be greatly appreciated!
Thank you for your time and consideration.