#201
IP: 72.218.152.245
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2 dog and everybody, I think I learned more about rebuilds on this thread than anywhere else. I really enjoyed reading every post. I appreciate your (2 Dog's) skill set and had fun following your chain of logic. And I really loved someone's comment to let the idea sit overnight and wait for the clear answer. I concur with that!
This old engine and boat are my age and are in better shape. I really dig old boats and well, old stuff. Well done 2 dog and well done photos.
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Bill McLean '76 Ericson 27 :valhalla: Norfolk, VA |
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2dogsnight (03-14-2017) |
#202
IP: 70.199.146.53
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Thank you Bill !!!
So today I had my car mechanic working on hooking up all gas and water stuff to the motor. New battery charged, had a water in a bucket.......and after few hours of preparations it happened......... This little motor runs like a Swiss watch, couldn't be happier. This summer it will be in the water - can't wait to see how this little boat will be running. Still lots of little stuff to work on - but I can see the light https://www.youtube.com/watch?v=xkPAy3UMYr0 I am posting this video from my Google + let me know guys if you can see please !! Atomic 4 ON !! posted link to you tube Wojo Last edited by 2dogsnight; 03-14-2017 at 09:57 PM. |
#203
IP: 73.177.131.145
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I love all the videos of newly-renovated A4s running on test stands in garages! Once you watch one, you'll see a list of other ones pop up on the right side of the page on YouTube.
Here's mine, from almost 6 years ago (!): [YOUTUBE]eGv9BrRclCM[/YOUTUBE]
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- Bill T. - Richmond, VA Relentless pursuer of lost causes |
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2dogsnight (03-15-2017) |
#204
IP: 70.199.146.53
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how do I find out what is the transmission ratio??
They come 2:1 and 3:1 for this motor |
#205
IP: 74.110.217.10
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That's if you have a reduction gear. In straight, "normal" configuration, it's 1:1 in forward and something like 1.3:1 in reverse.
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- Bill T. - Richmond, VA Relentless pursuer of lost causes |
#206
IP: 74.110.217.10
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I am highly envious of your engine accessibility.
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- Bill T. - Richmond, VA Relentless pursuer of lost causes |
#207
IP: 70.199.146.53
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Quote:
I thought that the reduction gear is a part of the transmission... |
#208
IP: 70.199.146.53
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there is a 17' wooden boat with an atomic 4 in it for sale in Vancouver BC
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#209
IP: 12.219.49.130
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Quote:
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Mike |
The Following User Says Thank You to marthur For This Useful Post: | ||
2dogsnight (04-04-2017) |
#210
IP: 70.188.74.2
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Yes 2dog, the u tube is watchable. Thanks for the post.
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Bill McLean '76 Ericson 27 :valhalla: Norfolk, VA |
The Following User Says Thank You to alcodiesel For This Useful Post: | ||
2dogsnight (04-04-2017) |
#211
IP: 74.110.217.10
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Quote:
The tail end of the crankshaft goes into the clutch pack. The other side of the clutch pack goes to the output flange, which is bolted to the prop shaft. So when the clutch is engaged (by pushing the lever into "forward" position), the clutch connects the prop shaft to the crankshaft. So they turn as one. The whole clutch pack rotates with it. When you push the lever to "reverse", it tightens the band around the clutch pack to stop it rotating. This causes the planetary gear mechanism to kick in, which makes the prop shaft rotate in the opposite direction. Due to the little planetary gears, it's not a direct drive, as it is in forward, and it reduces the RPM a bit.
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- Bill T. - Richmond, VA Relentless pursuer of lost causes |
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#212
IP: 71.178.83.106
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ILR, great synopsis..If I remember correctly, it is 1.4:1 in reverse. So if you can get 2,000 RPM in FWD you should be able to get 2,800 RPM in reverse.
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-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!) |
#213
IP: 74.110.217.10
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Isn't that math backwards? When you say it's 1.4:1 in reverse, doesn't that mean that the prop shaft is rotating slower than the crankshaft? So if the engine is at 2000 rpm, the prop would be rotating at something around 1,500 rpm?
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- Bill T. - Richmond, VA Relentless pursuer of lost causes |
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2dogsnight (04-04-2017) |
#214
IP: 71.178.83.106
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Quote:
I like to give the old girl a little run like our buddy Daniel has done in his skiff at 3,600 RPM (!!) and run her up to 2,700-ish RPM in reverse as I back up into the slip just to make sure she's capable...she hasn't failed me since 2009.
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-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!) Last edited by sastanley; 04-02-2017 at 10:05 PM. |
#215
IP: 70.199.141.221
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https://lh3.googleusercontent.com/-9...7-p/17%2B-%2B1
working on getting new rubber house over the shaft....after turning the rudder I should get an access to pull the shaft out .....in this posting I am more interested to figure out how to post pictures though.......I am guessing with this link posted, will give an access to check all pictures on my public Google account.....which is fine, but I would rather be able to post picture Last edited by 2dogsnight; 04-04-2017 at 02:29 PM. |
#216
IP: 70.199.141.221
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OK, figure it out the picture posting thing....
here is the packing box that needs new rubber house around it |
#217
IP: 71.178.83.106
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I see a pic of the prop shaft area inside the boat..looking good 2Dogs!!!. Depending on where you host the pics, sometimes you can use the {img}pic URL here{/img} but use square brackets instead of curley brackets.
however, MMI allows a very generous amount of pictures to be uploaded to their site directly as I suspect you have done for that #216 pic. Make sure when you get that new hose on there you double clamp at both ends! edit..let's try this...the pic link below is wrapped in the img tag as described above from your #215 post..let's see if this works!
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-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!) Last edited by sastanley; 04-04-2017 at 10:31 PM. |
#218
IP: 70.199.141.221
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I didn't know about using two clamps on each side of stuffing box!!
.................here is a question: would be OK to drill a hole trough the rudder where my finger is pointing without compromising structural integrity of it ?? I need to pull the shaft out of the boat, or at least few feet out, to be able to put new rubber hose over the stuffing box.......and drilling the hole trough the ruder at the pivot point ( which is in the center of the boat as is the shaft) would allowed me to do that without taking the rudder or motor out....???? |
#219
IP: 24.152.132.65
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Assuming the rudder is steel or bronze, I'd do it.
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others Last edited by ndutton; 04-05-2017 at 08:01 AM. |
#220
IP: 70.199.141.221
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Thank you Neil !
Will go scratch the paint to see what I have there....most likely it's a bronze |
#221
IP: 70.197.130.120
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I tend to agree with Neil..sorta...In either case, you need to be able to seal the hole so you don't get sea water filling up the rudder if it is foam/glass, or getting under the filler/paint in metal either.
But, your green paint picture looks like metal to me. Guidance from other metal rudder owners on the best way to fill and fair the hole might be needed. Why can't you drop the rudder? Isn't there a simple 6" tiller under the floor board with its own stuffing box that likely needs servicing?
__________________
-Shawn "Holiday" - '89 Alura 35 #109 "Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!) Last edited by sastanley; 04-06-2017 at 10:27 PM. |
#222
IP: 24.152.132.65
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I dunno about that guy in the picture. What's the butane BBQ lighter for?
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#223
IP: 70.199.141.221
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I didn't do any work on the boat because I had to work ......hahahah very funny.
Anyway, while working I had more time to think, and come to realization that I will need to remove the rudder because there is no room to install the propeller on the shaft.........rudder is too close to the end of the shaft. So no need to drill a hole in the rudder - it will not help. Check out the picture........ ...and yes, it's not that hard to remove the rudder, has it's own stuffing box - I had to remove it to get the shaft out - serviced the stuffing box then already |
#224
IP: 184.53.16.119
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Little Bear on the water
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#225
IP: 184.53.16.119
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So finally after all these years I have my boat in the water. Motor started with no problems and off we went.
I was running it only at 1000 rpm and we were going 7 mph, at 1500 rpm the speed was 15 mph. I was not pushing it more then that, as it was a first run after replacing bunch of stuff mentioned here in this tread. Overall I was pretty happy with everything about this boat and motor - there is still lots of stuff to do, but mostly cosmetics. Here is a short video.... https://www.youtube.com/watch?v=e4YBzAYFtnc |
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