[C38] a nest of academics!

Tue Feb 28 09:16:33 EST 2012

Julian: Wow, how cool! Four academics in the C38 club that I know of!  
And now you, an Aggie not to mention an evolutionary biologist; how 
small is this world!  My son got his master's in applied statistics at 
Ann Arbor a couple of years ago. Go Blue! (UCD athletics have gone 
downhill since you were here).
Sorry to be so ignorant of Universal diesels.  From what the others have 
said, it seems that the Universal throttle should be adjusted to have 
the slow end so low that it is effectively a stop switch. I can do that 
with my Yanmar, but it makes idling when cold a difficult proposition, 
especially for anyone who is not "one with the diesel"  I must replace 
my throttle cable, it is old and hard to work.
Regards, Don
http://www.eve.ucdavis.edu/stronglab/

On 2/28/12 5:56 AM, Julian Adams wrote:
>
> Thanks Don.   Well you anticipated my query.  I know that other boats 
> have a stop lever, but mine (I have Universal 5424 engine) does not. 
>  I had always thought that that second stop lever was for compression 
> release.    Every so often I cannot stop the engine by pressing down 
> on the throttle lever so that's when I go down below open up the 
> engine compartment and lift the compression release lever.     So what 
> is the stop lever connected to if it is not the compression release?
> Julian
>
> Description: seal2                           
> ****************************************************************************
>                            Julian Adams
>                            Professor of Molecular, Cellular and 
> Developmental Biology, and of
>                            Ecology and Evolutionary Biology, 
> University of Michigan
>                            830 N. University, Ann Arbor MI 48109-1048
>                            Tel. (734)-763-3431; Fax (734)-647-0884; 
> E-mail julian at umich.edu <mailto:julian at umich.edu>
>                             
> ****************************************************************************
>
> *From:*Don Strong [mailto:drstrong at ucdavis.edu]
> *Sent:* Monday, February 27, 2012 4:03 PM
> *To:* Catalina 38 Listserve
> *Subject:* Re: [C38] stop switch
>
> Dear Julian: My Yanmar has two levers on the bow end, starboard side 
> of the engine. One is the throttle, and the other is what Yanmar calls 
> the "stop lever."
> Both are connected by cables to the cockpit. Pill on the cable for the 
> stop in the cockpit, and the engine stops instantly.  If the cockpit 
> cable freezes up, as it did before I replaced the cable, the engine 
> can be stopped by pushing on the stop lever on front of the engine.
>     The compression release is used for just what Chuck suggests. I 
> also used it once when the manifold bolts broke, which resulted in 
> exhaust water shooting into the exhaust ports. I killed the engine,  
> opened the compression releases, squirted diesel into each cylinder, 
> and turned the engine over with the battery. No harm resulted to the 
> engine from this potential disaster. We replaced the bolts and running 
> again in two hours. If it had been a gas engine, I would have had to 
> remove the spark plugs to clear any water from the cylinders.
>
> Don
>
> On 2/27/12 12:49 PM, Chuck Finn wrote:
>
> We stop our engines by starving them of fuel.  The reason diesel 
> engines don't have spark plugs is cylinder compression is high enough 
> to cause the fuel to begin and sustain combustion.   The decompression 
> lever simply lowers the compression pressure in the cylinders and is 
> generally used to help turn over our engines when it is very cold or 
> the battery is low.  It can be used in an emergency to shut down the 
> diesel, but this leaves fuel in the cylinders (not good) and causes 
> hot gases to blow by the partially opened valves.  While this probably 
> does not hurt once in a while, I believe it would hurt your valve 
> seats, guides, etc. in the long run.  Besides the fact you are mucking 
> up your engine!
>
> If you are having trouble starving the engine, you need to adjust your 
> throttle linkage.
>
> Hope this helps!
> Chuck Finn
> Mighty Quinn #114
> Great Lakes
>
> On 2/27/2012 12:06 PM, Julian Adams wrote:
>
> I note the Service manual says that you must not use the decompression 
> lever to stop the engine -- saying it causes serious damage to the 
> exhaust valves.     I've used it many times -- is this really a 
> problem. What does it do to the Exhaust valves? (and what is it for 
> anyway?)
> Julian Adams
>
> *From:*Steve Smolinske [mailto:SSmolinske at rainierrubber.com]
> *Sent:* Sunday, February 26, 2012 5:59 PM
> *To:* Catalina 38 Listserve
> *Subject:* Re: [C38] head gasket
>
> http://www.marinedieseldirect.com/universal/200157/universal-owners-manual-caution-statements.html
>
> Universal engine manuals online
>
> Steve
>
> *From:*listserve-bounces at catalina38.org 
> <mailto:listserve-bounces at catalina38.org> 
> [mailto:listserve-bounces at catalina38.org] 
> <mailto:[mailto:listserve-bounces at catalina38.org]> *On Behalf Of *PAUL 
> NOTTE
> *Sent:* Sunday, February 26, 2012 11:36 AM
> *To:* listserve at catalina38.org <mailto:listserve at catalina38.org>
> *Subject:* [C38] head gasket
>
>   I need to change the head gasket on Impulse and I'm looking for a 
> free repair manual , has anyone found one on the net ?
>
>   Paul
>
>   Impulse
>
>
>
>
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>
>
> -- 
> Donald R. Strong
> Professor
> Dept. of Evolution and Ecology
> University of California, Davis 95616
>
>
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-- 
Donald R. Strong
Professor
Dept. of Evolution and Ecology
University of California, Davis 95616

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