The Hardy Motor Boat Owners Club Message Board.
Message board > Engines > Yanmar Poor Quality Bolts
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Message 1 of 8
Posted by member Peter Cox on Monday 8 June 2015
Message 2 of 8
Posted by member John on Tuesday 9 June 2015
They seem to be M4 brass (Yanmar Product Code WPS-M4) and cost £1 or so each. These are actually Johnston pumps.
I was thinking of replacing these with phosphor bronze studs and then using nuts to fix the cover, and possibly a little waterproof grease on the threads to minimise corrosion.
Best of luck
Message 3 of 8
Posted by member Peter Cox on Thursday 18 June 2015
Message 4 of 8
Posted by member Peter Cox on Tuesday 27 June 2017
Message 5 of 8
Posted by member DARKIVY on Wednesday 28 June 2017
Message 6 of 8
Posted by member Simon Kidd on Monday 24 July 2017
My old Caterpillars had Johnson Pumps and no issues there (though heat exchangers were a different matter!!, nor the Sherwood pumps on the Onan genny.
I've found a number of vessels with corroded A/P bracket stern gland and rudder gland bolts recently (Dezincified thus now made of copper!) - make sure they are all checked whenever ashore - use a good hammer and look at the bolt heads for the pink colour as a tell tell for dezincification..
I'll be keeping a sharp lookout on the pump covers, and sticking with Outboards for now!..
Message 7 of 8
Posted by member Peter Cox on Friday 1 September 2017
Marie tells me that Hardy have taken the matter up with Yanmar, but I'm not holding my breath for a reply from Yanmar.
Message 8 of 8
Posted by member Hardy Editor on Friday 1 September 2017
I did indeed mention to Oliver James about this problem when I last contacted Hardy Marine, and forwarded him the details which you kindly supplied to me. Oliver was pretty shocked. Iíve not heard anything further as yet, but I do think as a Club we should approach Yanmar directly and see what they have to say.
Iím afraid Iíve not had the time to do this myself, although it was my intention to do so. Iíve only just completed the September issue of the Hardy Owner magazine and sent the file off to the printers for proofing.
However this does sound like a very serious problem, Peter, and we really should take it upon ourselves to investigate further.
Perhaps a contingent of Hardy Owners should make a call (not in the euphemistic sense!) at the Yanmar exhibition area at the Southampton Boat Show Ė September 15thĖ24th (Stand E050 Ė email: firstname.lastname@example.org) and politely point out the facts as we understand them and ask them to comment on our findings. Iím game if anyone would like to join me. Iím unable to go on either the Preview Day (Friday 15th) or the closing day (Sunday 24th) but will let you know when I can visit, so perhaps we can meet up.
Anyone interested? Just contact me and let me know.
Marie OíConnell HOC Editor