vas
Well-known member
er, well, a few Paul
realised that I've been updating spin off threads of the rebuilt but haven't kept track of what's going on overall.
Due to Coronavirus, Uni is closed for two weeks, gives me some more time to work on MiToS and report ...
So, starting where I left the thread back in summer of 2018 with fitting the stabs.
Basically other than sorting out the stabs and replacing the dead mase gen control panel with a custom 800X600pixel touch screen for operating the stabs and generator, in 2018 I only did some light maintenance work.
Following is a video on the day I was returning back to port mid September, boat half full in fuel/water, 5ppl onboard, stabs off, almost WOT showed 20.6kn with trim tabs not working properly and lightly fouled hull. Was just a test to see if it would plane with stabs on (remember was a discussion on that in the Fins thread) and check how it fared at the back with the 250kg jetrib onboard. Pretty sure it would do much better without it hanging at the back, but np.
Replaced for the first time (ok, lasted 3-4yrs) the el. float switch of the 16lt whale grey water tank which died (as in not turning on and water flooding in the bilges, nice! So used one of my "stock" (had bought on ebay 4 WaterWitch el. float switches, now down to 2), tie wrapped on the lid assembly where the original float lived (and can be seen in the next pic):
BTW, last month ago, thing died again but now stuck constantly on. Will open up tomorrow and check/clean - hopefully wont have to replace again!
A new job was fitting someway to hold/hang toothbrushes/toothpaste/etc on the main head where there's still no space for such things, sink is tiny. Got these from IKEA and I stupidly bought two soap dispensers, one "cup" for all the bits and bobs and just 2 supports. Rationale was I wasn't too sure it will work OK (designwise) and I could keep the second dispenser as spare. Thing is they work v.well, highly recommend them and on my last visit to IKEA tried to get hold of another holder thing only to find out that they have discontinued the model
if anyone has for some odd reason any unused, I'd be interested-long shot I know.
With the start of 2019, I decided to tackle the Mase generator Yanmar 2GMF motor:
Turned out that it was lightly worn probably not really (IMHO) enough to justify a full rebuilt. Anyway, on putting it back together the mechanic realised that I also had issues with the el. fuel stopvalve (bolts on top of the high pressure pump). Starting from that, I decided to make a custom NMEA2000 control box picking up all sensor input from the various bits that I've fitted (originally only had a low oil pressure switch and a high temp switch!) and as part of the process add a linear actuator to up and lower rpm and kill the engine, so scrapped the stop valve.
Ever since, generator works fine but I still have problems with air in fuel lines somewhere around the CAV filter which I bought to replace the crappy yanmar one and which I'm planning to remove and revert to the yanmar
Trying to source a cheap and cheerful (AND NOT LEAKING!) filter maybe get a third Separ 2000/5 so that I can interchange with the main engine one if needed, we shall see. The whole process of unmounting the yanmar from the Mare(iirc) generator, shifting/lifting/sliding/lifting/sliding again the 2cyl engine out to the dock (boat was in the water) was interesting and needed lots of planning to avoid having the manually lift that by hand. All worked fine and I've got a deep score in the already damaged and in need of replacement thin ply-teak cover of the passerelle...
Since it was out, I got the opportunity to clear up the mess under there (didn't have decent access to do that as part of the rebuilt), so I started ripping things off, cleaning the plywood hull and using my trusty heatgun to remove coats of paint out if it. Although not easily accessible, ply was in v.good condition, all solid, so a few coats of my favourite paint and it was ready:
As part of the process, I replaced the oil soaked ply where the geny rested with a new piece of 20mm ply painted on both sides with the same grey paint I used to coat the cleaned Mase subframe.
Note the v.expensive sound barrier I installed around the e/r. Haven't finished, used it on the e/r to lazarette bulkhead as well as half the salon ceiling.
Subframe is solidly bolted to engine and generator and was mounted on 4 elastic mounts half of them not fit for purpose anymore. Especially the one that had some diesel spills on it over the years was badly affected, easy to spot on the following pic:
Ended up grinding off some pieces they at some point slapped on the subframe in order to fit these mounts. Got some new and v.cheap 60kg per mount rated ones from a shop in Athens, round single bolt easy to align and fit. Actually geny is now more silent and there's less vibrations but that could also be due to the full engine rebuilt.
Generator back on in place, nicely painted white in order
Custom NMEA2000 box has an input for a EGT probe (costed peanuts, had the code ready from the main engines no reason not to do it here as well...) but exhaust elbow was double walled there so needed a ugly looking mod to extend it by 40-50mm and weld the probe mount:
Another job I did during spring 2019 was service the engines. OK, so what, well, slapping things about, testing etc meant that the big 3phase el.motor running the hydraulic pump operating the stabs was in the way of accessing and removing the oil and coolant cooler/heat exchangers on port engine. With a bit of effort and a couple of days of work, I moved the heavy motor at it's final position on a custom "shelf" at the far front of the port side of the port engine space just next to the diesel tanks. Meant enough space to move and service engines:
As part of the heat exchanger dismantle/acid clean/refit, I got the opportunity to add some access points for more sensors. The following pics are from the charge air cooler endcap (that's the first point seawater reaches after the impeller). See what's collected in three (or was it two) years since last visit:
cleaned (v.roughly) and drilled:
drilled and fitted with an elbow and hose where the 0-2.5bar seawater pressure sensor mounts:
This update takes us up to spring 2019, before lifting out in order to do the underwater exhaust conversion. More on that in another post hopefully by the w/e or early next week.
cheers
V.
