[C38] stop switch

[Joseph Launie]

Don,
     I have a 4 cylinder Universal. All I know about engines is that you 
have to put diesel in the tank or they will not run. I have to hold the 
key to one side for 30 seconds to start which someone tells me is a glow 
plug. I have a button to hit to start the engine. I have a black handle 
in the cockpit by the switch and button which I pull up on to stop the 
engine. It works. I have no idea how or why. Joe Launie/Macavity

On 2/27/2012 1:02 PM, Don Strong wrote:
> 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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>>
>>
>>
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>
> -- 
> Donald R. Strong
> Professor
> Dept. of Evolution and Ecology
> University of California, Davis 95616
>
>
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