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| PW 27 forward reversing gear |
| Author |
Message |
    
William J. Foster
Member
Username: bill_foster
Post Number: 6
Registered: 01-2008
| | Posted on Friday, September 08, 2017 - 11:29 am: | 
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Hi All,
I was on the forum about a year ago with my PW-27, which is running and seems to work well. I'm now looking to build or find a boat to put it in. So before I go that far I have been running the engine and have found I can not get the fwd/rev gear to sit in the idle position. in order to have the companion flange not turn I either need to hold it or it seems use the reverse band to drag against the fwd clutch plates. It just seems to me as though the gear is not working properly, but I have no experience with this particular gear. I'd be interested to hear from others. I have read on this forum and in the manual that the gear needs to be properly adjusted. I have spoken to a few experts at Mystic Seaport and they echo this comment but also expressed it may be that the clutch plates are worn and the gear has been adjusted over time, resulting in the current problem.
To my question, how can I verify the setup of the gear? are clutch plates available if worn? what should I do to adjust or rebuild the setup to work properly?
Thank you, this site is a great resource.
Bill |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 1333
Registered: 07-2002
| | Posted on Friday, September 08, 2017 - 01:36 pm: |
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It's common for gears with no load to spin in neutral, the drag of the prop should stop it, some slow turn with the prop, not enough to move the boat. |
William J. Foster
Member
Username: bill_foster
Post Number: 7
Registered: 01-2008
| | Posted on Saturday, September 09, 2017 - 09:47 am: |
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J.B.,
Excuse me if you don't go by J.B. Thank you for the response. I'm somewhat familiar with that aspect of gears and it makes sense, it's largely why I've not given this much thought until now. What has me concerned is that if it's just slipping a bit, due to viscous drag between the clutch plates then I'm good I guess, but when I hold the coupling stationary the gear is noisy just like it is when in reverse. This makes me figure it's because it's still be driven through by the clutch and holding the coupling is equivalent to using the brake band/reverse. Not sure it makes sense but guess what my concern is that it's setup so reverse is engaged while it's still being driven through by the clutch/fwd, promoting wear?
I suppose the best thing is to fully understand how it should be setup and then verify that it is. This may be much ado about nothing. I would however be interested to hear from anyone who has the same setup how it sounds in neutral vs fwd vs reverse?
Thank you |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 1334
Registered: 07-2002
| | Posted on Saturday, September 09, 2017 - 02:36 pm: |
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I can't say how much noise is normal, especially without hearing it. Most were noisy, if it's straight cut gears more so. Helical gears are quieter, look in it, if the gears look good, shake them to check the bushings. The gears are loaded in reverse, idling in neutral, going along for the ride when in forward, everything is locked together by the clutches. If it looks good inside I wouldn't be too concerned about the noise. |
William J. Foster
Member
Username: bill_foster
Post Number: 8
Registered: 01-2008
| | Posted on Sunday, September 10, 2017 - 06:52 am: |
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Thanks for the input, I'll need to open up to change oil this year anyway so will check out bushings and cut of gears then. I did manage to find the relevant info regarding adjustments in the reprinted manual. It backed up what you said about you can only partially adjust the gear without the shaft connected and the boat in the water.
Regards,
Bill |
J.B. Castagnos
Senior Member
Username: jb_castagnos
Post Number: 1335
Registered: 07-2002
| | Posted on Sunday, September 10, 2017 - 10:23 am: |
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Bill thanks for the response, I like this site but for some reason a lot of post get no response when you give an answer, seems like one would answer out of courtesy, even if you don't agree with the advice. |
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