The motor has the same architecture. The same bad head design. The same bad combustion chamber. Your old points dizzy was set to 4 degrees of base timing with a maximum advance of 24 degrees for a total timing of 28.
The est dizzy will adjust up to 28 degrees.
Unless the bearings go bad from a leaking seal, the circulating pump will usually outlast the motor.
550 hours in 27 years is quite low. Average use is 50 hrs per year
Suggest you use the boat more
If the motor was running hot, you may have killed it
How hot is hot? Anything over 180 means you have an issue.
When was the last time you serviced the impeller and did a drive service?
You never buy parts until after you machine the block. Only way to do it, is to buy a new stock bore block and buy new stock bore rotating assembly
Agree with others, take it to your local engine builder
Suggest you get a good mechanic.
If you want to do the work yourself:
Rule #1 stay off youtube. Too much wrong information.
There is no easy button
Google Holley blades and center in the idle slots. Look at the Holley tech library
You adjust both screws the same at the same time
Read the...
as stated in your other thread. check your gauge.
if 1 and 4 have black, check your valve seals. you may be leaking oil into the combustion chambers
to adjust idle air on a holley 2300 2-barrel. adjust the two idle air screws in the carb base. make sure the blades are centered in the slot...
