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'73 silverton fiberglass 7k weight with single 318 10.5 ft beam. Is 17knots at 3100 rpm normal or not right?
Mr. Tahoerover, I'm messing with JJ, but just what would expect a timing issue to be?Not right. Peak horsepower is around 4000 rpms. There is something holding you back.
Timing issue
tune up full
/QUOTE]
I think your full tune missed something:
tune up full
/QUOTE]
I think your full tune missed something:
its an old pic. All parts that can be replaced have been and or cleaned
I have to agree with JJ. The numbers do not mean much to us unless we know if the 3,100 IS or IS NOT the WOT RPM.Are you maxing out at 3100 or asking if 17 knots is normal at 3100?
-JJ
I have to agree with JJ. The numbers do not mean much to us unless we know if the 3,100 IS or IS NOT the WOT RPM.
If 3,100 is the WOT number, then sometime is holding it back.
JP253, what would prevent you from strobing your timing marks, and seeing if the ignition is offering a progressive advance?
OK... if 3.1K RPM is MAX, you are below specs, although I don't know what your OEM specs are..... but that has to be low.Timing checking again tmmrw since work on dist. 3100 is max
Be very careful when changing flyweight return springs without knowing precisely what you are doing.boat is running better after replacing both dist weight springs. anyone know if the both springs should be the same?
Be very careful when changing flyweight return springs without knowing precisely what you are doing.
Yes.... each flyweight return spring is of a different value, and since you did not know this, I'll suggest that you read these threads.
http://www.marineengine.com/boat-forum/showthread.php?400801-Timing-a-318
http://www.marineengine.com/boat-forum/showthread.php?401023-Timing-and-max-RPMs-for-a-360
I understand that you need to replace these, but as I said..... Be very careful when changing flyweight return springs without knowing precisely what you are doing.I did not locate anything specific discussing spring replacement in the Mechanical advance. They were shot so I had no choice. But they are the same springs made for a malory dist.
I know..... we've been trying to find the Chrysler Marine specs for some time now. I've been doing the same with every Chrysler Marine work shop manual PDF file that has been posted.jp253 said:I have looked at an actual Chrysler book, several repair shops and speed shops.
No one has a clue about what springs to use..