Post by Charlie-Bravo on May 12, 2022 19:36:54 GMT
It’s been a niggle for a while, alternator belt adjustment, it is doable but not easily, and I never liked the idea of a belt change in a choppy sea, the bolt head for the adjustment , on a ‘banana’ bracket faces aft, and with insulation and bits of engine in the way makes for a three socket extension plus universal joint assembly ,( or a strange shaped spanner) to loosen it, and someone else to keep the socket on the bolt whilst attacking the pesky bolt from within the aft cabin.
Whilst fiddling , fitting new belts , pump impeller and primary filter, it dawned on me that it needed re modelling.
Pic shows a pack of stainless washers making about an 18mm stack , ( titanium spacer to replace the washers when a lathe and materials come to hand) and a M10 x 50mm long bolt (titanium replacement also required) to move the adjusting bracket to the fore, rather than its original aft position relative to the alternator, means you can now get a spanner on the bolt head, with no assistance, it’s accessible!
Stupidly simple, and makes the belt adjustment so much easier, why didn’t I do this two belts ago I wonder?
Excuse the rust on the hose bracket, ………. it’s French you know !
And no idea why the picture is on its side ….. I sail boats and no idea how to drive a computer/ ipad, just rotate it 90 deg clockwise for proper orientation .
Could be a unique thing to the SO 35 2006 Yanmar 3YM30 ……. but probably not.
Last Edit: May 22, 2022 14:56:13 GMT by MalcolmP: image
Not unique to your model. Their is a post pictures in a Sun Dream 28 FB page staring yesterday about a similar issue.
With boats in the 20+ yr bracket, seeing some picture of 30-40 year old motors, not surprising some maintenance is needed. A bit of rust here, older heated up parts, things get out of alignment, rust eats into belts, making the wear or break pre maturally.
A few also have the bolt on engine side vs easier to get to front motor side.
Will look at my setup tomorrow to see if I don't have some of these issues with my 85 2gym.
Post by Charlie-Bravo on May 15, 2022 20:53:44 GMT
One enterprising chap on the forum here found an even more elaborate solution, and put a hatch doorway in the shower enclosure ….. which also gives better access to the heat exchanger , but quite a lot more of a project than a stack of washers or spacer.
I just like things that might spoil the sailing day, to be able to be remedied without unnecessary challenge, and spannering at sea is something I try to avoid, ….. been there too often, one trip from Tresco Scilly Ilse to Ireland I accompanied a chap who, once we were on our way , declared he had lost the chart !! (pre navionics) then the engine stopped and wouldn’t re start, then the battery alarm went off and the instruments died. Being nominated as ships engineer into the engine bay I went with head torch to investigate, whilst Skipper sailed and navigated, I say navigated, but it was more of a ‘head north’ Ireland is up that way kind of thing, I did the usual of stripping lift pump and inserting a new diaphragm, checking filters etc but just couldn’t get fuel through, it looked like we had 3/4 of a tank full, 3 hours later with building seas, and regular use of a bucket, I discovered a little valve at the top of a fuel sight glass (pre fuel gauges on this boat) , opened the valve and all the fuel disappeared from the glass ! Bugger it said Skipper, we should have filled up before leaving ……( and a chart might have been handy as well ) never mind he said I have some fuel in jerry cans. Now 3am, blowing 6-7 sea going up and down rather a lot and raining sideways, storm sail up, no lights or instruments, we got some fuel and a fair quantity of water into the tank with cans …… (no tube or funnel) Spent hours hand cranking the old engine, it would occasionally start, then splutter to a stop, empty the water separator, new filter, crank some more …. repeat. As dawn broke Ireland appeared, the engine started, and we motored into harbour and then ran out of fuel again , just picking the first mooring that came along, ….. I got a bus and ferry home, Skipper continued to circumnavigate the UK reporting that the engine never missed a beat on the rest of the trip!
Trips like that encourage preventative maintenance, ….. and pre trip prep.
Latest improvements also include a top loading primary fuel filter with an easy bowl drain, which I really hope will be a complete waste of time and money, but if needed due to a dodgy tank of fuel, will be very much easier to change whilst bouncing around at sea.