The dealers scan tool will not help the dealer either installing the distributor correctly.
This isn't correct.
If the dealer follows service manual VPA 7743614 English 03-2016 page 73
9. Install the distributor cap.
10. Install the new distributor cap screws. Tighten the screws to 2.4
Nm (21 in. lb.)
11. Install the electrical connector to the distributor.
12. Install the spark plug wires to the distributor cap.
13. Install the ignition coil wire to the distributor cap
Important: If the malfunction indicator lamp illuminates
after installing the distributor and a DTC is set, the distributor
has been installed incorrectly.
Check the cam angle with a scan tool to ensure the
cam angle is correct.
14. Install the engine cover. See “Engine Cover” on page 55.
What I was trying to get across to
BRICH1260 Was that while the use of a scan tool to index the HVS is recommended by Volvo I haven't found it necessary. Iv'e replaced more than a few HVS's and found that following the instructions for the initial install gets it close enough.
Also tried to point out that following MerCruisers instructions that you posted with a possible final adjustment using the $10.00 tool that is in the service bulletin I quoted. Would be a lot cheaper than buying a scan tool or going to a dealer for just this job.
The trouble with the Volvo manual is that they want you to mark the HVS before it's removed. And we all know that most people don't want to read the instructions, until it's too late. This is why so many people post the MerCruiser instructions for this job.
Also I don't think it's a good idea to regap the spark plugs like
aimlow recommends. It ruins the platinum coating and doesn't provide any benefit on this engine.