Difference between revisions of "Diesel Engine"

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* Rebuilding an Exhaust Riser (also from Dave and a C36 skipper [previously posted])  http://www.realitycheck.me/building-...aust-riser.htm
 
* Rebuilding an Exhaust Riser (also from Dave and a C36 skipper [previously posted])  http://www.realitycheck.me/building-...aust-riser.htm
  
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*[[Why do some of our engines have different Oberdorfer sea water pumps than others, and what about that cir-clip "holding the impeller on"? ]]
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*'''[[Why do some of our engines have different Oberdorfer sea water pumps than others, and what about that cir-clip "holding the impeller on"? ]]'''
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The first part pertains more to C30's with M-25s/Oberdorfer pumps, than to M-25XPs -- but it's interesting background anyway....  
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The first part pertains more to C30's with M-25s/Oberdorfer pumps, than to M-25XPs -- but it's interesting background anyway....  
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The second part pertains to us all, and is subtitled "''Yes, you're right ...but we don't tell customers that''."
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The second part pertains to us all.....
 
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Here's the impeller/shaft misalignment, cir-clips stories....
 
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Grease cups are on the Ob 202M-03 and 202M-07 series pumps (which were also used on some of our Universals), but no grease cups are on the M202-15 and 202M-16 series pumps. 
 
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Back in the heyday of a boat-a-day per boat mfgr, Universal bought whatever model pumps were available from whatever sources they could get them (OB, SW) and made do.  Remember, "standard" is a word that the marine industry never embraced.  So to meet demand for engines -- remember 1 boat/day with "X" manufacturers = a crap load of demand for engines. 
 
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So, Universal fabricated a special adapter plate and shaft adapter w/ male-male ends (below) to use the female shaft (M-03/07) pumps on some of our female-socketed Universals (our cam shaft end has a female fork [see below also] to accept the male end of an optional hour meter on the Kubota tractors.)  Yes, that's what the "pump land" on our gear covers is there for -- not a pump -- but a mechanical hour meter for the tractor.) 
 
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When removing the pump impeller and shaft, it's usually a simple matter of reinserting/rotating the shaft/impeller until the male tang on the shaft lines up w/ the fork on the camshaft.  But with the Universals that had the M-03/07 pumps, the male-male shaft adapter would remain inside the gear cover and then be misaligned when sliding the shaft/impeller back in (the adapter had to fit OVER the end of the shaft AND align with the female fork.) 
 
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Because pump body blocks the view, one didn't know what the problem was, and blue streaks were oftentimes seen emanating from below and a purple haze floated above companionways along the dock.  Luckily I had removed my M-07 pump first (not pulled the impeller/shaft alone,) so I saw the deal and never pulled just the shaft.
 
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On the cir-clip "holding" the impeller on the shaft, here's the story.... 
 
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Back in the dark 90s when I replaced the Universal adapter plate, male-male shaft adapter, and Ob 202M-07 pump - with an Ob 202M-15 model, the engineer-side saw that the-clip was "doing nothing."  But the young-n-dumb diesel-engine-novice side said, "Before I trash this clip, I want the expert(s') opinion(s') on why not to do that." 
 
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I went 'round and 'round with Ob techies about the cir-clip and no one could fabricate a reasonable explanation why it was there ---
 
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"''It holds the impeller in plac''e" (Nope, not necessary -- the pump cover does that.)
 
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"''It keeps the shaft in place''." (Try again, the end of the cam shaft keeps the shaft from dropping out of the pump.)  As determined as they were with BS, they couldn't get rid of me or the nagging question that begged for an answer -- "Why would you folks spend the money to machine a groove in the shaft and buy cir-clips, unless there's a good reason?" 
 
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Out of sheer frustration I guess, and maybe to play a trick on an old-tymer colleague, they passed this idiot along to his extension.  it backfired -- he had been at Ob long enough and was honest enough to reveal the truth.  Ob had issues with the shafts coming out whenst pumps were knocked about in shipping (nah, not UPS) and thrown around in warehouses (really?) and the cir-clip holds it all together until the pump is bolted on. 
 
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"''Yes you're right, it's unnecessary to have it on there and you can remove it once the pump is installed  ...but we don't tell customers that''."  
 
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--[[User:Kloebereng|KWKloeber]] 08:07, 15 May 2015 (PDT)
 
  
 
== Electrical ==
 
== Electrical ==

Revision as of 15:44, 15 May 2015

The Catalina 34 has had at least three different motors. The M25, a 21hp engine, was installed on the the early models. The M25XP (23 hp) became standard in 1988. The M30, a 4 cylinder producing 28hp, became an optional engine about the same time and is standard in the Mark II. All are produced under the Universal Motors brand (now Westerbeke Corporation). Due to lack of available supplies, the factory occasionally installed a Yanmar engine (note: Yanmars are higher-compression engines, which do not require glow plugs).

General

CRITICAL UPGRADES includes a lot of engine information: Critical Upgrades http://c34.org/bbs/index.php/topic,5078.0.html

[RESOURCES - good M25 engine information,from a C36 owner http://realitycheck.me/resources.htm]

Cooling

The first part pertains more to C30's with M-25s/Oberdorfer pumps, than to M-25XPs -- but it's interesting background anyway.... 
The second part pertains to us all, and is subtitled "Yes, you're right ...but we don't tell customers that."

Electrical

Engine Harness Upgrade from Maine Sail http://www.pbase.com/mainecruising/universal_wiring_harness_upgrade and http://forums.catalina.sailboatowners.com/showthread.php?t=135558

Thermostat Sender Source http://c34.org/bbs/index.php/topic,7985.0.html]]

Fuel

Mechanical

[NOTE] The filter interchanges at the above OTT website link can't necessarily be trusted; double-check if you use them.
 Notice, for instance, that OTT lists NAPA p/n 3389 for both fuel and lube application. I don't THINK so. I brought this to OTT's attention and suggested they correct the list. OTT asked ME to provide THEM all the correct interchange numbers and they would revise the website.
Again, I don't THINK so. :-) --KWKloeber 21:33, 29 June 2014 (PDT)


Transmission Fluid 101 - link to the message board: http://c34.org/bbs/index.php/topic,6417.0.html


Universal M-25 & M25XP Alternator Bracket Upgrade & Alignment IMPORTANT

http://c34.org/bbs/index.php/topic,7917.0.html

Misc Projects

  • Options to Route Crankcase Breather Hose to Air Intake VIEW THE PDF

Shaft & Propeller

Also of Interest

Westerbeke/Universal now has the owner manuals online. You can download them at http://www.westerbeke.com/Products/OnlineManuals.aspx

Kubota Block Equivalents (you have to scroll down) http://www.ericsonyachts.org/infoexchange/showthread.php?10241-Universal-5432-amp-M40-engine-information&highlight=kubota+block

and

http://c34.org/bbs/index.php/topic,8113.msg56648.html#msg56648

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