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Go Back   SailNet Community > General Interest Forums > Gear & Maintenance
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  #1  
Old 09-06-2013
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Diesel Starting

A friend has a 31' Allmond with a diesel engine.

He was told that he had to use the glow plug every time he wanted to start the engine even if it was just turned off a couple seconds before the restart attempt. Don't remember the engine model probably Universal.

Have you every heard of something like this?
The way I figure it once the engine is hot the glow plug is not going to make it any hotter.
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Old 09-06-2013
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Re: Diesel Starting

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Originally Posted by davidpm View Post
The way I figure it once the engine is hot the glow plug is not going to make it any hotter.
That's been my experience with diesel tractors, diesel autos and my boat (oh, no, my boat doesn't have a glow plug). If its hot, no need to wait for the glow plug.
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Old 09-06-2013
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Re: Diesel Starting

Quote:
Originally Posted by davidpm View Post
A friend has a 31' Allmond with a diesel engine.

He was told that he had to use the glow plug every time he wanted to start the engine even if it was just turned off a couple seconds before the restart attempt. Don't remember the engine model probably Universal.

Have you every heard of something like this?
The way I figure it once the engine is hot the glow plug is not going to make it any hotter.
Many Universal & Westerbeke engines are wired so the glow plug must be activated before the start button can be.

With a warm engine no glow is usually needed but with the Universal/Westy factory wiring you must press glow in order to use the start button.

I have our engine wire so I do not have to press glow in order to start and when warm I don't use glow. For our engine I can start up to about 4-5 hours after a full warm up use without glow. Let it sit over night and glow is necessary.
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Re: Diesel Starting

Like Maine Sail said. Mine is a Universal too.
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Re: Diesel Starting

Yup; the glow plug has to be used. Just went thru this last weekend on a small universal. It was news to me too.
My perkins fires regardless, every time.
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Re: Diesel Starting

Quote:
Originally Posted by Maine Sail View Post
Many Universal & Westerbeke engines are wired so the glow plug must be activated before the start button can be.

With a warm engine no glow is usually needed but with the Universal/Westy factory wiring you must press glow in order to use the start button.

I have our engine wire so I do not have to press glow in order to start and when warm I don't use glow. For our engine I can start up to about 4-5 hours after a full warm up use without glow. Let it sit over night and glow is necessary.
That's interesting.
Do you have to hold the glow plug in while you start it?
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Re: Diesel Starting

It's quite simple; If the engine will start without glow plugs, great, if not, use them. There is no rule that says you MUST use glow plugs every time you start an engine.

If an engine is in good condition and is already warmed up it should restart without any start assist. If the engine is old and tired, and the cylinder compression is down a bit, then it might need glow plugs every time you start it to make up for the lack of compression.
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Re: Diesel Starting

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Originally Posted by SchockT View Post
It's quite simple; If the engine will start without glow plugs, great, if not, use them. There is no rule that says you MUST use glow plugs every time you start an engine.
On most factory wired Universal and Westerbeke engines you MUST use the glow plug button in order to activate the starter button. There is no way around this other than to re-wire the circuit..

Westerbeke likely does this to prevent folks from hydrolocking engines. Course they may have done it to prevent owners from cranking too long and physically melting the grossly undersized starter wire many 70's & 80's production builders used....

Quote:
Originally Posted by SchockT View Post
If an engine is in good condition and is already warmed up it should restart without any start assist. If the engine is old and tired, and the cylinder compression is down a bit, then it might need glow plugs every time you start it to make up for the lack of compression.
Yes exactly BUT with factory wired Universal/Westerbeke's you must press glow in order to activate the start circuit...
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Last edited by Maine Sail; 09-09-2013 at 07:58 AM.
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  #9  
Old 09-09-2013
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Re: Diesel Starting

Quote:
Originally Posted by davidpm View Post
That's interesting.
Do you have to hold the glow plug in while you start it?
On my Universal, the START button is wired in series with the PREHEAT button. This means that I must press PREHEAT to have the START button do something. I can press them at the same time (together) if I like. This could be simply changed by moving a jumper from one terminal of the preheat switch to another...

But why would you do this? If your batteries are so close to dead that this becomes an issue, switch to the other bank, or get a bigger battery bank.
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Last edited by eherlihy; 09-09-2013 at 10:33 AM. Reason: clarity
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  #10  
Old 09-09-2013
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Re: Diesel Starting

mine doesnt have glow plugs, thank gods.....my repair friend does have glow plugs. i like mine better.
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