Memphis_Chung
Well-Known Member
PS did you get the black smoke/sludge and drop in revs as well?
Any Engine Doctors out there?
- Thread starter Memphis_Chung
- Start date
Seanick
Well-Known Member
Agree with the above. Would add that the stainless hub does jam up with the slightest forign body that may have been introduced via the grease gun.
Solution? A Bruntons Vari-prop or Vari-fold !
Solution? A Bruntons Vari-prop or Vari-fold !
sailorman
Well-Known Member
the MaxProp is "Quite Nice"
Seanick
Well-Known Member
Very true, nicer even! But it does not fit into the small apertures of classic (timber and GRP) boats. Mind you nor does the Vari-fold, but it is cheaper than a Kiwi, so worth mentioning!
Clyde_Wanderer
Well-Known Member
I had a very similar problem last autumn when motoring into the hoist bay to get lifted out, only it was forward the symtoms were showing up, but same symptoms as yours although not a saildrive or Kiwi prop, when got lifted out, there was a huge plastic sack wrapped round the prop.
It does sound as if your prop is giving max risistance and engine cant build up enough horses to overcome the resistance from neutral or low revs but if you horse it into reverse at higher revs the required horses to get over the resistance is already there.
It does sound as if your prop is giving max risistance and engine cant build up enough horses to overcome the resistance from neutral or low revs but if you horse it into reverse at higher revs the required horses to get over the resistance is already there.
Clyde_Wanderer
Well-Known Member
[ QUOTE ]
I have just had another thought. If the prop is not going into the correct position in reverse, wouldnt it have problems shifting into the forward postion on the few occasions that reverse has worked?
[/ QUOTE ]
Not nesseccarily.
I have just had another thought. If the prop is not going into the correct position in reverse, wouldnt it have problems shifting into the forward postion on the few occasions that reverse has worked?
[/ QUOTE ]
Not nesseccarily.
oldestgit
Well-Known Member
Yes same black smoke and lack of revs..
The increased pitch is working the nuts off the engine, much like a workshop dyno could, but not a problem as long as you just swiftly go from forward to reverse.
My best guess is that one of the blades is either sticking on the shaft base or more probably a seized roller, that posibly coupled with the spring resistance.
I have an ambassador cutter and I painted my blades one Red, one White and one Blue (to see the difference colour made to antifoul performance on the blades over a season). The up side is because of that contrast I can see them turning in some water conditions and there is nothing visibly restricting their movement.
Because of my initial problems I inspected every Kiwi I spotted out of the water
last summer: 1 at Levington and 2 on the south coast, all 3 were partly or fully seized in the reverse action and in the case of the one at Levington all 3 blades were well massacred as if it had been chewing more than a rope.
I have agreed with Alan that I will do a report on the year for him, but won’t be lifting her until probably mid April so will continue to put up with it till then.
Have fun…. Peter
The increased pitch is working the nuts off the engine, much like a workshop dyno could, but not a problem as long as you just swiftly go from forward to reverse.
My best guess is that one of the blades is either sticking on the shaft base or more probably a seized roller, that posibly coupled with the spring resistance.
I have an ambassador cutter and I painted my blades one Red, one White and one Blue (to see the difference colour made to antifoul performance on the blades over a season). The up side is because of that contrast I can see them turning in some water conditions and there is nothing visibly restricting their movement.
Because of my initial problems I inspected every Kiwi I spotted out of the water
last summer: 1 at Levington and 2 on the south coast, all 3 were partly or fully seized in the reverse action and in the case of the one at Levington all 3 blades were well massacred as if it had been chewing more than a rope.
I have agreed with Alan that I will do a report on the year for him, but won’t be lifting her until probably mid April so will continue to put up with it till then.
Have fun…. Peter
andybussell
Well-Known Member
I had the same problem with my new kiwiprop towards the end of last season. Worked fine for 6 months though. I have a tidal berth and I think that mud in the mechanism was affecting its ability to adopt the correct pitch in astern.
PeterGibbs
Well-Known Member
Saildrive - what's the condition of the oil in the gearbox? Pristine and clear and up to the mark when the dipstick is rested on the diphole?
If that's ok I suspect the gearbox selector. Why? Because you have to pass straight through neutral to engage reverse properly. If I'm right, it's a stripdown - out of the water.
Why do I say this? 'cos your description fits exactly what happened to my 120 drive.
I caution against trying to run it for a time to "clear the obstacle" This could result in further damage.
Sorry to raise that prospect, but if the engine is doing its stuff, reaching revs without discharge, where else can you look?
Good Luck.
Peter Gibbs
If that's ok I suspect the gearbox selector. Why? Because you have to pass straight through neutral to engage reverse properly. If I'm right, it's a stripdown - out of the water.
Why do I say this? 'cos your description fits exactly what happened to my 120 drive.
I caution against trying to run it for a time to "clear the obstacle" This could result in further damage.
Sorry to raise that prospect, but if the engine is doing its stuff, reaching revs without discharge, where else can you look?
Good Luck.
Peter Gibbs
matelot
Well-Known Member
[ QUOTE ]
I painted my blades one Red, one White and one Blue (to see the difference colour made to antifoul performance on the blades over a season).
[/ QUOTE ]
/forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
Lovely. And what is the scientifically gained conclusion?
Did something similar myself once on my bilge keels so I know where you're coming from..
I painted my blades one Red, one White and one Blue (to see the difference colour made to antifoul performance on the blades over a season).
[/ QUOTE ]
/forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
Lovely. And what is the scientifically gained conclusion?
Did something similar myself once on my bilge keels so I know where you're coming from..
oldestgit
Well-Known Member
Sadly nothing as yet gained as I won’t be lifting her until mid April, when I am not expecting any earth shattering discoveries, just the usual fouling.
Having said that I was surprised to notice that at slow revs in not too grotty water you can quite easily see the blades turning where as when they are all the same colour it’s just a blur.
I had all 3 colours in part used pots of Trilux so utilised my left overs and hoped it would shed some light on the old tale of darker colours being better than lighter colours for antifoul, (but I don’t want to open another antifoul discussion).
Looked quite arty farty or one might even say pretty.
Yes I took flack from all the lads about at lift in time. /forums/images/graemlins/blush.gif
Enjoy............ Peter
Having said that I was surprised to notice that at slow revs in not too grotty water you can quite easily see the blades turning where as when they are all the same colour it’s just a blur.
I had all 3 colours in part used pots of Trilux so utilised my left overs and hoped it would shed some light on the old tale of darker colours being better than lighter colours for antifoul, (but I don’t want to open another antifoul discussion).
Looked quite arty farty or one might even say pretty.
Yes I took flack from all the lads about at lift in time. /forums/images/graemlins/blush.gif
Enjoy............ Peter
PeterGibbs
Well-Known Member
One last thought before you lift her. Referring to an earlier post - probably you've covered this anyway: is it possible the cable control to the gear box has been dislodged either at the lever end or at the fixing to the actuator on the gear box? So that engaging reverse is hampered?
It's not a likely solution, but just could be implicated.
PWG
It's not a likely solution, but just could be implicated.
PWG
oldestgit
Well-Known Member
Thanks Peter.
Not sure if your post was directed at me or (Dawson), but sadly yes, one of the first things I checked back in August and all is tickety boo cable wise
... Peter
Not sure if your post was directed at me or (Dawson), but sadly yes, one of the first things I checked back in August and all is tickety boo cable wise
... Peter
Memphis_Chung
Well-Known Member
I have also checked the cables and to my untrained eye they seem OK.
thalassa
Well-Known Member
[ QUOTE ]
I had the same problem with my new kiwiprop towards the end of last season. Worked fine for 6 months though. I have a tidal berth and I think that mud in the mechanism was affecting its ability to adopt the correct pitch in astern.
[/ QUOTE ]As I mentioned in an earlier thread, I had the Kiwi prop for the better part of two seasons, with reverse failing each August. It was not only black smoke then, but the engine dancing in its private cabin. Not very reassuring when negotiating a lock... At the time, this was classified by fellow posters as porkies, and I got a sour post from the dealer. On the whole, glad I send it back with minor loss of money.
I had the same problem with my new kiwiprop towards the end of last season. Worked fine for 6 months though. I have a tidal berth and I think that mud in the mechanism was affecting its ability to adopt the correct pitch in astern.
[/ QUOTE ]As I mentioned in an earlier thread, I had the Kiwi prop for the better part of two seasons, with reverse failing each August. It was not only black smoke then, but the engine dancing in its private cabin. Not very reassuring when negotiating a lock... At the time, this was classified by fellow posters as porkies, and I got a sour post from the dealer. On the whole, glad I send it back with minor loss of money.
Clyde_Wanderer
Well-Known Member
[ QUOTE ]
Sadly nothing as yet gained as I won’t be lifting her until mid April, when I am not expecting any earth shattering discoveries, just the usual fouling.
Having said that I was surprised to notice that at slow revs in not too grotty water you can quite easily see the blades turning where as when they are all the same colour it’s just a blur.
I had all 3 colours in part used pots of Trilux so utilised my left overs and hoped it would shed some light on the old tale of darker colours being better than lighter colours for antifoul, (but I don’t want to open another antifoul discussion).
Looked quite arty farty or one might even say pretty.
Yes I took flack from all the lads about at lift in time. /forums/images/graemlins/blush.gif
Enjoy............ Peter
[/ QUOTE ]
You might need to change your prop if sailing in Irish Republic waters, or god knows what might happen. /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
Sadly nothing as yet gained as I won’t be lifting her until mid April, when I am not expecting any earth shattering discoveries, just the usual fouling.
Having said that I was surprised to notice that at slow revs in not too grotty water you can quite easily see the blades turning where as when they are all the same colour it’s just a blur.
I had all 3 colours in part used pots of Trilux so utilised my left overs and hoped it would shed some light on the old tale of darker colours being better than lighter colours for antifoul, (but I don’t want to open another antifoul discussion).
Looked quite arty farty or one might even say pretty.
Yes I took flack from all the lads about at lift in time. /forums/images/graemlins/blush.gif
Enjoy............ Peter
[/ QUOTE ]
You might need to change your prop if sailing in Irish Republic waters, or god knows what might happen. /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
blaggard
Active Member
I ran my engine this morning and noticed it wouldnt go above 800 revs in reverse. was planning to have a look at the cables tommorrow until i read this thread! I fitted a kiwi prop last winter as was well chuffed with it over the summer. reading the other comments im not so sure now. /forums/images/graemlins/frown.gif
Memphis_Chung
Well-Known Member
any black smoke or sludge?
The thing that worries me is that I am not sure I have the experience to fix it. I will speak to Vecta tomorrow and see what they say. These props are v expensive, will be a shame if it becomes a liability.
The thing that worries me is that I am not sure I have the experience to fix it. I will speak to Vecta tomorrow and see what they say. These props are v expensive, will be a shame if it becomes a liability.
blaggard
Active Member
no black smoke. i ran it while tied up in the marina. i would be interested in what vectra say
sailorman
Well-Known Member
if tied alongside, in gear, the engine will never reach full revs /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
