#151
IP: 165.225.38.121
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
#152
IP: 100.40.58.241
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Hello Surcouf.
I recall 3 gauges in one of your earlier photos, but I don't think I saw a tachometer. Do you know what rpm you are idling at? jack. |
#153
IP: 165.225.38.121
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no I do not, the middle one (not connected in voltage). I would have used a gun from the office, but with Covid situation, I have not been able to get it. At this point, this engine is not even idling yet. I am "holding it" playing with choke and gas levers for now.
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
#154
IP: 100.40.58.241
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It's hard for me to judge RPM from sound alone, but if I had to guess I would say your idle RPM are low. Below is a link to my A4 right after its rebuild. It was idling at about 750 according to my tach gun. MM's recommended idle is in the 600-1000 range.
https://www.youtube.com/watch?v=RKvHFCEKO-w jack. |
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Surcouf (05-13-2020) |
#156
IP: 100.36.65.17
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I agree with the others. The idle RPMs sound too low. Try increasing the setting of the idle stop screw on the throttle lever.
Although others have reported idle as low as 600 RPM, mine sits at about 850-900. If you check the carb, be absolute sure that all the idle passages are clear. Simply spraying carb cleaner through them won't cut it. You must physically "ream" each one with a small wire. The center wire from a bread tie is just the right size and stiffness for this job. In addition to the idle jet, there are three small openings in the throat that straddle the throttle plate when closed.
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@(^.^)@ Ed 1977 Pearson P-323 "Dolce Vita" with rebuilt Atomic-4 |
#157
IP: 99.30.185.198
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PCV?
One element that has a direct affect on the idle capabilities of an A4 is whether or not it has a PCV system. If a relatively healthy A4 has a clean carb and has been set to factory ignition specs, I have found that they will idle as low as 500 rpm's without stalling when going in and out of gear. A4s with PCV valves normally seem to want to idle in the 700 or higher range.
Tom |
The Following 3 Users Say Thank You to thatch For This Useful Post: | ||
#158
IP: 108.34.135.205
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Tchatch, no PCV system here (just the usual bent plastic tube coming in front of the flame arrest or at the suction of the carburetor
One question for you guys: I found that at the bottom of my Moyer Marine parts box, and I am not sure if that comes from MM, or is just another lost item from my general mess.... any idea what this is??
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
#159
IP: 174.192.43.124
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- It: «*hey you*!!!*»
- me: «*who is talking?*» - it*: «*it is me of course, Bomby your engine!! - me: «*OK it is so late I am starting to hear voices...*» - it: «*stop being stupid... what are you doing wrenching me at 1AM? «* - me:*«*you not running well, not idling. So I am trying to troubleshoot and cure you*» - it: «*and what have you done?*» - me: «*compression, Check. Sparks, check; timing, check. Fuel, just overhauled the carburetor, check. Exhaust not clogged, check. Timing, check. What is left???*» - it: «*I would like to sleep too, so the best is to help you... what is written on my side? «* - me: «*?????*» - it: «* what is written on my side? In the casting!!!*» - me: «*your date of birth? We are both from the same year you know*» -it:*«*no idiot, above that!!!*» - me: «* firing order 1-2-****!!!!-4-3...***** ****!!! I can’t have done that mistake «*... And yes ... - it:*«*and suddenly he gets it... not the brightest bulb of the block this owner!!*» And now it purrs like a kitten!!!
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
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TimBSmith (10-22-2020) |
#160
IP: 99.30.185.198
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Firing order quiz
If you don't already know why the firing order is 1243, do a little research on the "flat crankshaft" and impress your friends on the dock. Almost everyone has made the firing order mistake at least once.
Tom |
The Following 7 Users Say Thank You to thatch For This Useful Post: | ||
Administrator (05-16-2020), Dave Neptune (05-16-2020), Easy Rider (05-18-2020), ronstory (05-17-2020), sastanley (05-18-2020), Surcouf (05-17-2020), TimBSmith (10-22-2020) |
#161
IP: 138.207.175.104
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To paraphrase a comment often used by my favorite "news aggregator," If you want to publish a comment from all the guys who have done that, you're gonna' need a bigger blog.
Bill |
The Following 2 Users Say Thank You to Administrator For This Useful Post: | ||
Dave Neptune (05-16-2020), Surcouf (05-17-2020) |
#162
IP: 67.169.215.221
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... regardless how we got here, this is still a "WOO-HOO!" moment.
Congrats!! May Bomby purr for many years.
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Thanks, Ron Portland, OR |
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Surcouf (05-17-2020) |
#163
IP: 108.185.228.107
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+1 WOO-HOO!!!
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#164
IP: 174.192.43.124
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Sorry I have to vent here... who is the absolutely stupid electrical engineer who designed the Catalina 27 electrical circuit and decided to implement a 12 feet harness with trailer-type plugs? What was the goal? Move the engine to the dock to test bench it???
2 broken pins on my harness clogged with corrosion... time to re-wire all that!! 3 of those 8 connectors were unused following decades of modifications. The only positive aspect of that harness is that I do not need to buy any cable to re-wire properly all that!!!
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
#165
IP: 24.152.132.140
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We have always - - admittedly incorrectly - - assigned the responsibility for those plugs to Catalina but the cold, hard fact is they are an original Universal/Westerbeke monstrosity. Here is a drawing from the Universal/Westerbeke Installation and Maintenance Manual, page 18, that clearly shows the 8 pin plugs at the engine and instrument panel with the extension harness connecting the two together.
The corrective action is to get rid of the plugs by either butt splicing the wires together, adding screw down terminal strips in place of the plugs or creating an entirely new harness of your own minimizing terminations. As for the latter, it's the most work but in my opinion produces the best result especially considering your engine wiring is at least 40 years old. Here is what can be achieved. Yes, that is the same engine in the same boat.
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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; 05-17-2020 at 07:29 PM. |
#166
IP: 174.192.43.124
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Thank you Neil.
I am going to te-wife point to point, those plugs are already gone. Hopefully I took enough notes; but let’s be honest, this is pretty simple system at the end of the day. But no way I make it look as nice as the one in your picture. I have order one of those «*common bus bar*» for the grounds. There were probably 10 cables bolted to the flywheel cover. Thank you!!
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
#167
IP: 174.192.43.124
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So on the to-do list before being able to put the boat back in the water:
- shaft packing. First time for me, went OK. - the exhaust discharge flex pipe... this is another story. I was thinking of leaving the existing one, saving a few bucks, and let the next owner take care of that.... but honestly with the engine out, it was a unique occasion to do so, as access to the «*end of the mine*» is a nightmare with the engine in place in a Catalina 27. So after 1 hour of crawling back and forth to gather more tools, of swearing, sweating, cramping and suffering, the bas**** is out. And it is not pretty: this flex pipe was completely collapsed the last 5 inches before the hull pass-trough. A serious restriction for exhaust flow. Glad I decided to tackle that one.
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
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TimBSmith (10-22-2020) |
#168
IP: 24.152.132.140
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Quote:
Having everything on hand is a huge factor toward success. String the wires into a harness* with ample length, enclose it in wire loom, lace it into the boat training the wire ends gracefully to their destinations and connect the ends. Have a variety of end terminals, shrink tube, soldering iron and solder (if you like) and Ty-wraps handy and enjoy the day. * I like to use a 2x8 plank as a work surface to pre-assemble the harness. Using nails or screws as anchoring posts start at one end and identify it on the plank as Instrument Panel with a Sharpie, then do the same at various lengths for the starter, coil, alternator, water and oil senders. Do the wire loom encasement on the plank too. Don't skimp on wire, it is better to throw 2 feet away than be an inch too short.
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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 |
#169
IP: 165.225.38.121
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Quote:
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) Last edited by Surcouf; 05-18-2020 at 08:23 AM. Reason: typo |
#170
IP: 47.142.128.25
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Here's How I Rewired My CAT 27*
From the cable. There was plenty of wire in the coil of wire under the cockpit to make the cable. Temporally tape the cable under the starboard side of the cockpit sole. Adjust and cut the wire lengths, remove the cable and crimp, solder, heat shrink the end connectors, reinstall the cable permanently and hook everything up.
For the oil pressure gauge I did not include the wire in the cable. I didn't want a wire across the top of engine where I might snag it with tool. Instead I ran it along the top of the cockpit locker to the gauge. Held the wire in place with tape every foot or so then put silicon adhesive between the tape and took the tape off the next day. It took me a bit more than a day to do all this. ex TRUE GRIT *hull #4446 built in 1979 |
#171
IP: 69.250.111.245
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Congrats on getting her running. If you really just want to get moving for Memorial Day, I'd cut the plugs off and butt splice the existing wires..quickest and cheapest. However, I bet you will find some corrosion creeping up the wires, so hopefully you'll have enough length to get good contact.
Another inspirational pic, here is my re-wire. I did as you were thinking as well..the port terminals are ALL ground, and the stbd with colors is the engine harness. Not quite as neat as Neil's work..his standards are high!
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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!!) |
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Surcouf (05-18-2020) |
#172
IP: 108.34.135.205
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So:
- 750 rpm idle - oil pressure around 35 psi at idle, 40rpm at a higher speed - compression 95-100-100-105 A4 final test https://youtu.be/vIKsUPqOUao Now disassembly and in the boat tomorrow or Friday. No pressure for Memorial Day... Thank you to all Afourians for your help. Would not have been possible without you. One question I need to ask, because English is not my first language: what does «*Afourian*» mean??
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Surcouf A nostalgic PO - Previously "Almost There" - Catalina 27 (1979) |
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Administrator (05-20-2020) |
#173
IP: 138.207.175.104
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Quote:
I made up the MVP stuff, too. Bill |
#174
IP: 67.169.215.221
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A person stubborn enough and crazy enough to keep a circa 1955 gasoline engine that most would consider obsolete in top running condition in a world full of diesel sailboats... because it's cool.
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Thanks, Ron Portland, OR |
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Administrator (05-21-2020), Ando (05-20-2020), sastanley (05-20-2020), Surcouf (05-20-2020), The Garbone (05-23-2020) |
#175
IP: 99.30.185.198
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I've always been interested in the evolution of this little motor, so I guess that makes me a "Californian, Afourian, Historian". Bada,Boom.
Tom |
The Following 6 Users Say Thank You to thatch For This Useful Post: | ||
Administrator (05-21-2020), Ando (05-20-2020), Easy Rider (05-21-2020), sastanley (05-20-2020), Surcouf (05-20-2020), TimBSmith (10-22-2020) |
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