Rebuilding the engine

This off-season I had decided to tackle the engine. Although over the years it had been pretty reliable it now looked a little tatty, the paint particularly on the rear of the engine was gone with lots of rust showing. I considering getting a new engine, perhaps a beta marine instead of the Yanmar but decided to best thing was to hoik the old Yanmar out, strip it down and inspect it and then make the decision..

Once the boat was out of the water, shored up in the yard, It didn’t take long to disconnect it and then the yard hoisted it out for me and lowered into the back of my trailer. I could take it home and strip it in my garage. It would give me something to do over winter.

The engine before rebuild

First look  made me glad I had taken it out and I was soon stripping it down which revealed a few problems so a list of work and parts needed started. Digital photography is a great boon these days. Quick snaps of the disassembly process with a mobile phone give you a record of how things come apart and even of what they are! It helps  to have a nice spare bench to lay out all the bits in order, grouped together or in separate trays. As work progressed I reckoned that with a rebuild there was no need for a new engine, and the extra work and expense that would entail.

Rocker cover off – spot the missing valve cap

Dismantling the head and lifting off the rocker assembly, I at first thought I had dropped one of the valve caps but close inspection and I realised it had been assembled with one missing. Worse was on removing the injectors, one came out easily enough the other was stuck. Eventually I freed it and then the reason for it’s ‘stuckness’ revealed. It had been assembled without the essential domed top of the injector chamber and heat shield washers. There were some curses for the bodge artist who last had had the engine apart and put it back together with the parts missing. No wonder that it hadn’t been running so smoothly.

Cylinder head before cleaning

The internal water ways in the block and head were badly ‘limed” up so I cleaned these by sealing off the outlets and filling the passages up with cheap white vinegar. This fizzed reassuringly with plenty of bubbles so you knew it was doing it’s work. Flushed out after an overnight soak the passageways were nice and clean.

The block cleaned off and primed

With the block stripped of old paint, wire brushed and de greased, it was time to repaint. What to use? In the end it seemed a choice between tractor enamel or Rustoleum, I opted for Rustoleum as there were favourable comments about it on various forums. 2 coats of primer and 2 of top coat were used and the rest of the engine parts similarly treated. The resulting colour was a little more silvery than the original Yanmar paint. Time will tell if it is nicely durable.

Repainted block & head

Gradually the engine went back together, a new oil seal behind the flywheel, valves ground in, a new external oil pipe, new valve oil seals and cap, new injector nozzles, the correct ignition chamber parts and some other bits. I even built a sort of frame for the trailer to which I could bolt the engine so it didn’t slide around when I would take it back to the yard. By the end of January it was all done, ready to fit back in the boat. That would wait until later when the days were a little longer and hopefully warmer.

Engine on frame in trailer

Fitting out done & shakedown sail.

I had made a start on the winter work schedule just about as soon as the lockdown easing at the end of April allowed me to travel down to the boat yard. I made a start and got a fair bit done but then was interrupted by a spell of cold and wet weather which put a stop to the work. It wasn’t until almost the end of May that finally we had some good weather and I was able to proceed with fitting out. Of course there is always far more to do than you first anticipate and it all takes longer than expected. There were few nonessential things I wanted to do but decided to put off. Eventually it was all done and the Sea Bear was ready to go back in the water. A few days after the yard told me that she was back on her mooring I went down to Pin Mill with Wendy for company. It was a lovely hot sunny day and after dinghying out to the boat we had a leisurely afternoon just settling in and relaxing.

Wendy & Sea Bear

Pin Mill Sunset

Next morning we slipped away from the mooring, there was no much wind but we did care about that, just sailed and drifted slowly down the river. It was Wendy’s first trip in the area so she was happy to have plenty of time to enjoy the sights. We decided not to go too far and once past Harwich we just headed for the Pye End buuy and hence to the channel to the Walton Backwaters. I though to anchor off Stone point, never having anchored there before but once there I wasn’t too happy with the Anchorage, it either felt too close in and too shallow for when the tide ebbed of far too close to the channel to be truly relaxing so we moved into Hamford water to anchor – much more relaxing. Not long ad after we had settled the wind increased and veered to the NE. This created quite a chop so it was a little uncomfortable for a while but it later eased. Next morning we spotted a pair of Avocets working along the shoreline, it was the first time I had ever seen these distinctive birds. Once the tide had risen enough we set off back out the channel and could just hold the line close hauled so had a good sail back to the mooring. There was enough tide for us to go ashore and have a walk though Pin Mill woods.

Pin Mill views

Returning back I made a classic mistake in that I overlooked the old age dictum of time and tide wait for no man. Actually it was the lure of a pint in the Butt & Oyster, which was perhaps my downfall. Maybe after it was excusable, as I had not had a pint in a pub since before lockdown, October last year, and even so that was just once since lockdown had started way back in March the previous year. Wendy queried whether we would have the time before the tide dropped but anyway the pint prevailed but sure enough back at the pontoon and the dinghy was high & dry. And so it was that I made my first acquaintance with Pin Mill mud – I won’t so easily make that mistake again!

A rear gantry for Sea Bear

Sea Bear now has a rear arch fitted. A process that started way back in April has now come to fruition. I had a local fabricator make me up a stainless steel tubular structure which is now fitted in place.

New rear gantry fitting

New rear gantry fitting

Next step is to mount a solar panel on it.

Back in the water.

At last after much work over the winter Sea Bear is back in the water. The stormy weather of the early part of the winter had delayed progress a little, but now just about all jobs were done. As well as the usual maintenance, the old standing rigging had been replaced, a new furlex fitted, and whilst the mast was down I had mast steps fitted and some clutches to make halyard control better, the old jammers on the coach roof which had proved not so good at jamming, were also replaced with clutches.

refurbished cockpit

The refurbished cockpit

The teak laid cockpit seats had been refurbished and looked like new. The CQR anchor had been relegated to backup duties by a new Mason Supreme anchor, we were getting all modern and up to date you see. Below decks, the old engine mounts, one of which was well and truly shot, had been replaced. I had fitted a new AIS transponder and replaced the depth and log instruments with more modern versions and all internal light bulbs replaced with LEDs and finally a water filter fitted for the drinking water.

In the boat yard ready & waiting for launch.

In the boat yard ready & waiting for launch.

It was now just a matter  of getting her put back in the water. I’ll confess I find launch day about the most stressful day in the sailing year. It’s not just the hoist but what the weather will be like, the waiting and have you remembered everything.

Craned into the dock

Craned into the dock

We are afloat

We are afloat At long last Sea Bear has been launched and we are afloat moored to a pontoon in Swanwick marina. It has been a long haul and with many frustrations with dealing with the boat yard and contractors to get all the work done. Even now there has been a last minute hitch as the riggers haven’t fitted the new vhf aerial. It’s enough to try the patience of a saint. But we are all provisioned up and passage plans made so tomorrow should see us set up for our sail from the Solent up to North Wales.

Afloat at Swanwick

Learning new skills

The weather has not been kind for fitting out and so I am a bit behind. I had planned this weekend to be a big push to move things along. Instead I am snowed in at home. Still I thought I could do something useful. I’ve been a sailor for over 10 years now and I had never spliced multi braid rope. High time I learnt.
The mainsheet traveler control lines on Sea Bear were attached to the traveler by passing through an eye with a stopper knot to secure. Awkward, ugly and lubberly it called out for two eye splices.
So it was out with the fids, read the instructions and watch tube videos. I made my first mistakes on a bit of gash old rope before turning to the control lines proper.
Here it is my first multi braid eye splice.

first eye splice