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Thread: Merc 280 trigger wheel?
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01-27-2024, 10:24 PM #1
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Merc 280 trigger wheel?
Why does a 280 trigger wheel have large teeth and some small teeth?
XR2001 & XB2002
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01-30-2024, 12:20 PM #2
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So the computer knows where tdc is. Same way all the cps work
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01-31-2024, 05:18 PM #3
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Not sure if that answers my question. On the trigger wheel tdc is where the teeth are missing.
Typically 24 minus 2 with all the teeth being the same size. On the 280 there are 4 or 5 shinny teeth.
Why?XR2001 & XB2002
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01-31-2024, 05:42 PM #4
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I think, so that the system can "sync" and start firing injectors & spark plugs in 1/3 revolution (or less) instead of waiting (up to) a full revolution to see one the "missing tooth" and start the engine?
Originally Posted by malexie
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02-04-2024, 09:44 AM #5
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David - WI thanked for this post
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02-22-2024, 09:55 AM #6
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Tells the computer the engine position for sequential efi Originally Posted by malexie
action mobile marine, 772 528 0754, dealers for aces fuel products,wolf efi, pro marine,latham and gaffrig/livorsi. we build gearcases and modify them(3 litre) to ratchet, and powerheads as well. 21 skater/3 litre wolf efi 113 mph the engine build http://www.screamandfly.com/showthre...-3-litre-build
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