Hi all

I have a 2010 440 ‘TEQUILA SUNSET’...and am on the Gold Coast, Queensland, Australia

I had the Sd 50s replaced with the updated sd60s and since then have had issues with drive from the Flexifold 3 blade props.

Prior to that no issue at all, turn both ways on a dime!

At present the sb prop won’t open when going astern... all other drives are fine. Linkages are fine... shafts are spinning fine in both directions but prop won’t open in astern drive.

Props and shafts are as clean as a whistle and there has been no damage to them.

Yanmar agent who did the work won’t come to view the issue despite 2 booked appointments.

Anyone have any similar experiences or suggestions?

Cheers
Rex

Something to consider,

on fitting new props to original sail drives (similar but different), our mechanic took considerable care in shimming the props so that they did not "bind" on the shafts, the shims came with the prop.

Suggest looking into the installation instructions for the props. The new shaft splines are likely to be a slightly different length ... so props may need shimming.

Kingsley

L470

Thanks for that Kingsley

the props were the original ones on this occasion...

still an issue???
cheers
rex

开云体育

Hi Rex,
I may be a little late with the reply but I had an issue with my 2 blade Flexofolds on a L380, turned out the socket head cap screws were over torqued an not allowing the blades to feather or fully extend in reverse.? just loosened them a little and no more problems.
Hope you have it sorted by now
Regrds
Baldrick

Hi

I have a 2008 Lagoon 440 that came with SD 50's and flexifold props. 6 or 7 years ago when the sd 60's came out I replaced the sd 50's. Never had a problem. Sounds like to nedd to recheck your installation.

Mike
Captiva Lagoon 440

Hi Baldrick

hey never too late for volunteered valuable very plausible advice on how to solve this problem, which still exists and which I am finding no one from Yanmar, which includes Flexifold, wants to know about or actually honour arranged appointments to view the problem and offer a solution....grrr!?

As I have eliminated all possible mechanical issues, ie gear selection linkages and connections, damage or fouling of props, drive shaft issues, it will be down to something ‘simple’ and obscure which your suggested cure might very well be!?

You are referring to the central lock nut, I watched a vid on YouTube where he removes the prop and then replaces it and tightens that nut as hard as he could... but this is the one you are referring to??

I will need to lift the boat to do this so will put it to the Yanmar dealer who replaced the drives and see what he says.?

It was suggested it could be caused by the different gear ratios between the Sd 50 and the new sd60 sail drives...Any views on that????

I really appreciate the input Baldrick and will post when I have checked it out.?
Cheers and happy self isolating !?

Rex

Thanks Mike... yes very much son but the Yanmar dealing Who did the replacement and was well paid for it is being very evasive and doesn’t want to know.

Cheers for your input
Rex

Thanks Dean... they did replace as they were... I watched them!?
Cheers
Rex

Cheers Mike?
?

Hi Rex,
The shaft nut should be as tight as practicable and should not affect the feathering.? It was the shaft the blade pivots on and the cap screw that is used to retain it.? I just checked the Flexofold website both 2 and 3 blade are similar in function.
The installation drawings in step 5 refer to pivot pin (8) and Locking Screw (9).? Step 6 is where there could be the issue.
If over torqued they bind and will not move freely.? Mine were over torqued on installation.? I had no where to haul so I fixed the problem in Esperanza, Vieques SVI while at anchor. I did have the advantage of a dive tank and I just backed off the bolts slightly until the blades moved easily.? It didn't take long.? They had a loctite compound on them but it was only a slight movement just to allow them free movement.? they were slightly stiff and would not feather fully.? we used a GoPro underway to check the correct operation.? perhaps that is an option for you to see what is happening.? Good luck and let us know how you resolved it.? it may be good to know for the future
Rick