QuestGirl
Active Member
Anyone who read our blog for last weekend will realise that yet again, we have had a busy time without actually managing to go anywhere (well, we made it 50 yards from the pontoon this time, so that's a marginal improvement on not even untying the lines!)
This time an overheat alarm put paid to our plans to leave our berth for the weekend. After checking all the obvious things like water intake inlet / intake pipes / water strainer, it became apparent that I was going to have to be brave and start dismantling the engine for the first time /forums/images/graemlins/shocked.gif (hubby knows even less than I do about diesel engines).
After prevaricating for a time and re-reading the manual, previous owner's instructions and my RYA guide to Diesel Engine Maintenance several times, I finally took the plunge and removed the alternator belt & water pump belt and got the water pump out (physically impossible to remove the cover plate in situ).
After a little help from a neighbour, we managed to prise the cover plate off (seems previous lubricants had sealed the gasket a bit too thoroughly) and subsequently removed the impeller which only had 3 splines left. More delving in pipe work recovered all the pieces, but now I'm struggling to source replacements.
After trying every chandlery I could think of in the Solent area on Saturday (mainly by phone after the first 3 called no joy) , I had to wait until Monday until I could get to the Yanmar dealer at Bursledon to get a new impeller and gasket for about £27.
The one I removed was a Johnson with the number 827 stamped on it. The Yanmar equivalent is 128296-42070 (or possibly new number 124223-42092 if not in UK).
I have tried all the listings that come up on the first 3 pages of Google searches but cannot find any impellers that match either from a shop or mail order except from the Yanmar spares place. The engine is a 19 year old 3GM30 which isn't all that unusual - any ideas where I might source cheaper replacements from, or am I stuck with returning to Yanmar to fork out another £27 for spares? (U.S. sites won't ship to the UK - I tried!)
By the way, I managed to put everything back together again and restart with engine with a decent water flow and ran it under load for about 30 mins without any problems so that's my first engine demon dealt with. Oil change and oil filter is next.....
This time an overheat alarm put paid to our plans to leave our berth for the weekend. After checking all the obvious things like water intake inlet / intake pipes / water strainer, it became apparent that I was going to have to be brave and start dismantling the engine for the first time /forums/images/graemlins/shocked.gif (hubby knows even less than I do about diesel engines).
After prevaricating for a time and re-reading the manual, previous owner's instructions and my RYA guide to Diesel Engine Maintenance several times, I finally took the plunge and removed the alternator belt & water pump belt and got the water pump out (physically impossible to remove the cover plate in situ).
After a little help from a neighbour, we managed to prise the cover plate off (seems previous lubricants had sealed the gasket a bit too thoroughly) and subsequently removed the impeller which only had 3 splines left. More delving in pipe work recovered all the pieces, but now I'm struggling to source replacements.
After trying every chandlery I could think of in the Solent area on Saturday (mainly by phone after the first 3 called no joy) , I had to wait until Monday until I could get to the Yanmar dealer at Bursledon to get a new impeller and gasket for about £27.
The one I removed was a Johnson with the number 827 stamped on it. The Yanmar equivalent is 128296-42070 (or possibly new number 124223-42092 if not in UK).
I have tried all the listings that come up on the first 3 pages of Google searches but cannot find any impellers that match either from a shop or mail order except from the Yanmar spares place. The engine is a 19 year old 3GM30 which isn't all that unusual - any ideas where I might source cheaper replacements from, or am I stuck with returning to Yanmar to fork out another £27 for spares? (U.S. sites won't ship to the UK - I tried!)
By the way, I managed to put everything back together again and restart with engine with a decent water flow and ran it under load for about 30 mins without any problems so that's my first engine demon dealt with. Oil change and oil filter is next.....
