Just thought I'd give you an update as to the progress with the re-power. I finally made the decision to go with the Yanmar
55hp 4jh4e for various reasons. It's non-turbo and therefore has less to go wrong, and also I heard some negative comments about the volvo
option with regards to EVC issues and parts
availability. I guess the most crucial reason was the hoards of cruisers that all advised me the Yanmar
was the better option. Given I'll be selling the boat sometime in the future, I thought that made good sense.
I worked out the 4jh4e is a great fit for a 4-108 replacement given it's smaller in almost all dimensions and can be bought with several gearbox options which means you have a number of options for mounting. We are also a little nose heavy (110m of chain and 2 x anchors don't help) and the new engine will be lower and further aft which should help the balance of the boat no end.
of the 4.108 was pretty easy. I managed to hang a block from the bolts underneath my binnacle (we are a V42 centre cockpit
Tayana) and then swing the engine back and out into the saloon
. I then removed most of the parts
(heat exchanger / flywheel / starter / alternator
/ brackets etc) and the engine was lifted out on a travelift quite easily.
I sold the old engine on Trade-me to a guy who is fitting it into an old (almost 100 year old) launch in the South Island. He got a great deal on the engine, and I'm sure it will serve him well for years to come.
I then spent 2 weeks cleaning
and painting my bilge
, which now looks like a million dollars compared to the oily mess I had with the perkins
. I have also taken the opportunity to replace a number of hoses and wires that are hard to reach with the engine in situ.
Yanpower (brand new Yanmar dealership in Auckland
- very helpful) then built me a pattern for the new engine which we put into the engine room and adjusted until we got it in the perfect spot. My shaft has a down angle of about 12 degrees which meant the old perkins
with a straight gearbox had the same angle. I have opted for the Yanmar with a 7 degree down angle which means the new engine will sit at about 5 degrees. I have also ordered a new engine driven pump for a watermaker
which arrives today. I will work with Yanpower to build a bracket to hold the pump lster this week, so we can install the engine with the bracket already built.
One problem I have currently is the 3 inch exhaust requirements for the 4jh4e mean my waterlock has to be far larger than the old one. I'm therefore looking at custom fabricating a water
lock which will fit the lines of the bilge
in order to get the correct drop from the mixing elbow
to the water level inside the lock. I'm pretty sure we have worked this one out now, but there was more than a little head
scratching during the engine bed
calculations. Other than that - I will have to run larger diameter hose from the engine room back, but that just means opening up the existing holes a little, I don't see many problems there.
Alternators are still a question and I'm not sure which way I will go. Upgrading the 60 to an 80amp on the engine is a no brainer at 120nzd, but I will need something larger and more Marine
(ie deep cycle / higher output for longer) rated. I'm looking at adding a second high output alternator to the engine with the yanmar bracket, or simply replacing the 80amp with a high output and only having one. It all depends on how much room I have when the engine is in place. Yanmar have been great and are working with me in offering the bracket as an after purchase
option, I believe you normally have to specify upfront whether you want the 2nd alternator bracket or not.
Anyhow - that's probably enough for now. Happy to answer any questions if anyone is looking at doing the same thing...