We first thought that the propeller hub alone could be replaced. But it turned out that the existing folding propeller on Molia was not made by Volvo, so it proved impossible at present to identify and locate a replacement part.
I must give a shout out here to FYB Marine in Falmouth, who are the official Volvo Penta Service Dealers for Cornwall, and in particular to Jerry Hobkirk there who advised on the correct specification for a new propeller. Not something I could have done.
Molia has a 19 HP Volvo Penta D1-20 engine coupled to a Volvo saildrive 130S-B. Jerry ran the propeller size calculation which takes into account the engine, the gear ratio (2.19), the waterline length (8.62m) and maximum beam (3.4m). It comes up with a 2-blade 16×10 left-hand propeller, and I had already specified that it must fold.
Apparently all the prop shafts over a certain Volvo Penta saildrive size (including the 130S-B) are the same.
I will post a photo of the new propeller here – as soon as it arrives.
Jerry is a mine of useful information and advice about these Volvo engines. All very much appreciated for an engine beginner like me!
There are 2 flexible gas hoses that need replacing regularly on a boat to satisfy surveyors and insurers, and keep you safe!
Cylinder Hose – leads from the cylinder valve to the start of the (usually solid) boat gas distribution pipe. On Molia there is a bulkhead connector at the back of the gas locker.
Cooker Hose – this leads from the other end of the boat gas distribution pipe to the cooker.
Orange is the colour required by BS3212 for uncovered type 2 LPG gas hoses.
BS 3212 – British Standard specification for the performance and dimensional requirements for rubber tubing, hose and complete assemblies for use in LPG vapour phase and LPG/air installations in environments up to a maximum ambient temperature of 60°C.
Status : Superseded, Withdrawn Published : June 1991 Replaced By : BS EN 16436-1:2014+A2:2018, BS EN 16436-2:2018
( BS 3212) 3.1 Classification
a) Type 1: flexible tubing for applications not exceeding 50 mbar working pressure.
b) Type 2: hoses for applications not exceeding 7.5 bar working pressure.
(BS 3212) 3.2 Colour Identification
a) Type 1 shall be black.
b) Type 2 shall have an orange cover …
The upper hose has is a 1/4 inch left-hand nut connector. The lower hose has the ‘GOK’ 8mm compression connector of the type used on Molia. (GOKis the German manufacturer of these connectors.)
Small diameter LPG hose connectors should be ‘crimped’ which these are.
Here is one I took apart: the metal ferrule is crimped onto the outside of the orange hose clamping the ‘hose barb’ securely in place.
The fittings must be stainless steel and brass (as illustrated) to comply with UK marine standards.
You should replace the cylinder valve if it is showing signs of corrosion or wear.
First identify the gas bottle type – an excellent help video here from Go outdoors also shows how to fit the valve to the bottle.
Molia has a Camping Gaz R907 bottle. These are popular on continental Europe, and readily available in the UK.
Molia has a Camping Gaz R907 cylinder valve. Only some surface corrosion so we will replace this another time.
So the first plan is to take Molia down to a swinging mooring off Dittisham on the River Dart. So we are going to need a tender to get to and from the jetty if the ferry is not running.
Choosing a Tender
We wanted something large enough to take a crew of four safely, but that is not too heavy. So the 3D Superlight Tender Twin Air 290 was our choice. It weighs only 17 kg but is 2.9m long.
Choosing an Outboard
It is not very far from the moorings to the jetty at Dittisham, so this is more something for future use.
In the spirit of ecology we looked at a couple electric outboard motors. These are quite unusual in the UK at present, and are disadvantaged by limited range. However, they have some significant plus points if you do not need a long range:
Electric outboards are very clean to store on your boat – no fuel and no oil mess.
You can recharge them from multiple sources: shore power, engine or a solar panel.
They run very quietly.
We looked at this make which is becoming quite well known. These motors break into 3 sections for carrying: the handle, the battery and the motor. These units weigh 14.2 kg.
Benefits from not being the first: longer range, quieter and faster battery charging time than the Torqeedo. These units weigh a bit more at 16 kg.
It only breaks into 2 sections for carrying, but its motor is direct-drive, so there is no mechanism above the water – which is what makes it quieter and more efficient.
Not tried it in the water yet – I will let you know.