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Wales
by Joske Vermeule, September 1
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Forums39
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Jun 14th, 2026
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Joined: Oct 2007
Posts: 423 Likes: 2
Learner Plates Off!
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OP
Learner Plates Off!
Joined: Oct 2007
Posts: 423 Likes: 2 |
Does anyone get a crashing sound from the engine when attempting to start? Sometimes get this sound and sometimes a backfire when starting. Once started it runs great??
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Feb 2019
Posts: 3,857 Likes: 2
Talk Morgan Addict
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Talk Morgan Addict
Joined: Feb 2019
Posts: 3,857 Likes: 2 |
Take a video with the sound on as close to the engine as possible and share it.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Joined: Jan 2014
Posts: 1,075
Has a lot to Say!
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Has a lot to Say!
Joined: Jan 2014
Posts: 1,075 |
Lance, what year is your M3W and do you know if it has the Harley type compensator or the newer Centa type compensator?
Dan
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Joined: Oct 2007
Posts: 423 Likes: 2
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Mine is a 2016 with the center compensator. Runs fine once started
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Oct 2012
Posts: 2,822 Likes: 155
Talk Morgan Expert
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Talk Morgan Expert
Joined: Oct 2012
Posts: 2,822 Likes: 155 |
Just noticed this thread, mine does something similar, my guess is that it is the easy start decompressor mechanism not quite staying open long enough for the engine to start. Feels a bit like a good old fashioned kick back when starting a bike, the sort that breaks ankles/catapults the rider over the bars when it happens on the kick start.
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Joined: Oct 2007
Posts: 423 Likes: 2
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Joined: Oct 2007
Posts: 423 Likes: 2 |
That is exactly what it feels like
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Oct 2007
Posts: 423 Likes: 2
Learner Plates Off!
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OP
Learner Plates Off!
Joined: Oct 2007
Posts: 423 Likes: 2 |
Just noticed this thread, mine does something similar, my guess is that it is the easy start decompressor mechanism not quite staying open long enough for the engine to start. Feels a bit like a good old fashioned kick back when starting a bike, the sort that breaks ankles/catapults the rider over the bars when it happens on the kick start. Is this an issue or something that has to be adjusted??
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Oct 2012
Posts: 2,822 Likes: 155
Talk Morgan Expert
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Talk Morgan Expert
Joined: Oct 2012
Posts: 2,822 Likes: 155 |
Just noticed this thread, mine does something similar, my guess is that it is the easy start decompressor mechanism not quite staying open long enough for the engine to start. Feels a bit like a good old fashioned kick back when starting a bike, the sort that breaks ankles/catapults the rider over the bars when it happens on the kick start. Is this an issue or something that has to be adjusted?? I honestly don't know for sure but I've lived with it for nearly eight years now... 
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Joined: Feb 2018
Posts: 807 Likes: 38
Talk Morgan Regular
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Talk Morgan Regular
Joined: Feb 2018
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[quote Is this an issue or something that has to be adjusted??
[/quote]
There is nothing to be adjusted with the easy start (compression release) cams, as they have a simple pivoting mechanism deactivated by centrifugal force once the engine fires and is above about 500rpm.
My car has the same undesirable characteristics on start, but you can hear the compression "leak" afforded by the easy start cams so they are working. I can't imagine how hard it would be to start one of these engines without the easy start feature.
I'm looking at upgrading to the 569 cams (which also have the easy start feature) not so much for performance, but more for the higher overlap they have which can only ease starting.
Steve
Late 2012 M3W
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