Re: Replacing old Petters 6hp for Yanmar 8hp singl « Result #2 on Jan 5, 2010, 6:04am »
Ivor,
Re. authorisation, the webmaster is the son of an Eygthene owner who is into computers. He updates the site every few weeks when he has tiome.
It shouldn't be too hard to find a good man in Weymouth to put the engine in for you. Have you joined a local yacht club? That's the first place to start asking for the name of a reliable engineer who has done a similar job for a member. There is someone down here in Falmouth, but I think he is too far away.
You could also post an enquiry on the PBO reader to reader forum at http://www.ybw.com/forums/index.php hoping someone from Weymouth will see it who can suggest an engineer. I look at that forum every day.
In your position I would prefer to go the first route. You can't beat a personal recommendation from someone who has gone through it himself. If you are not already a member, do look for a good local Yacht club to join, where they have plenty of small cruisers (and hopefully some club moorings). These are the people that will help you and through them you will have lots of fun and companionship from like-minded souls.
Re: Replacing old Petters 6hp for Yanmar 8hp singl « Result #3 on Jan 4, 2010, 5:38pm »
John,
Your help is greatly appreciated!
Humdinger and myself are in Weymouth, Dorset. I am still waiting for authorization on this site, as of Saturday.
I have pdf document via your link, thank you kindly.
I am not a handy man of your caliber, by far. I need to find a skillful hand in our neck of the wood. But to understand the process is very important for me.
Most important is your view about strength when cutting!
Re: Replacing old Petters 6hp for Yanmar 8hp singl « Result #4 on Jan 4, 2010, 5:07pm »
Ivor,
Now that I've seen this manual, it is just for installing an intercooler for fresh water cooling on a YSM8, however it does show lots of pictures of the engine. It looks a bit wider than the 1GM10 which has its cylinder vertical. I can see that it might foul the quarter berth.
Ideally, you would fit the narrower engine, but if you already have the YSM8, then cutting away part of the quarter berth would not be too bad. You could probably make up a piece of GRP moulding to bond into the gap and close off the bilge. Then with a bit of a box on the side of the quarter berth panelling, maybe the quarter berth would still be reasonably usable?
We find the quarter berths are the most comfortable berths in Siddique, so we would not want to lose the use of one of them.
I am sttill waiting for it to download, so I am writing to you whilst I wait.
The quarter berth is an inner moulding that does not contribute to the strength of the Eygthene 24 hull, so if you have to cut it away, that is not a problem.
I can't find you on the members nor on the guests lists, so I don't know where you are in the world, to recommend an engineer to help you with the installation. In any case, I installed the 1GM10 engine myself with not much trouble.
Re: Replacing old Petters 6hp for Yanmar 8hp singl « Result #7 on Jan 4, 2010, 6:10am »
Dear John!
Many thanks for your swift expert answer.
My issue is: perhaps 8hp Yanmar YSB - with horizontal stroke - has different dimensions. It's exhaust pipe looks too long too. Can you recommend an engineer who can come and fix the engine for me, please? How much such job can cost approx.?
Re: Replacing old Petters 6hp for Yanmar 8hp singl « Result #8 on Jan 3, 2010, 10:48am »
Dear Ivor,
I replaced the Petter mini six in Siddique with a new Yanmar 1GM10 in 2005.
The new engine went straight in where the Petter had been, as it is slightly smaller. I did not have to alter the quarter berths at all.
The existing engine bearer on the port side was relieved for part of the Petter's sump and I added a 600mm length of stainless steel angle to bridge this cutout and to provide a support for one of the Yanmar's flexible mounts. Actually, the Petter's bearers were slightly too widely spaced for a perfect fit for the Yanmar mountings, but I was able to stretch the Yanmar's mountings slightly wider apart than they should be and I got away with it.
The single lever control was replaced at the same time, as there was too much wear in the mechanism of the old one.
One problem that I did have was that the Yanmar's mountings are much softer, allowing the Yanmar engine to move much further when it is vibrating at certain speeds. The extra movement caused the propshaft to rattle against the inside of the stern tube. After a season, the sterntube broke away from its bonding in the hull, causing a quite serious leak of seawater. I cut out the old bronze stern tube and bonded in a much wider GRP sterntube.
Another problem would arise with the propellor. The Petter requires a left-hand prop and the Yanmar requires a right-hand prop. Fortunately for me, someone had already fitted a right-hand folding 2 bladed 12 x 8 prop to the Petter, which had been arranged to run in astern when motoring forwards! This prop was exactly right for the new Yanmar.
You will find the Yanmar is an excellent choice. Please let me know if I can be of any further help.
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