So I have quite a few things up in the air right now but basically I'm putting the engine together.
I have it in the completed stand (avec wheels) and am putting the head on (soon) but have run into a couple of quirks doing so.
Am not sure why (checking timing?) but I put a distributor on and noticed the rotor-arm wasn't pointing where it should be (per WSM photo) despite having correctly followed the instruction for inserting the pump-drive in relation to the crank.
Once I'd accepted I'd done something wrong it was back off with the sump and do the pump-drive thing again making sure that #1 piston was at TDC
It didn't take that long tbf and the slot on the drive (for the distributor dog) is in correct position of 55 degrees. Interestingly there is a different setting if you are using an alternator instead of a dynamo. The drive needs to be set one tooth out to give an angle of 77.5 degrees.
This is actually nothing to do with the ignition-timing or valve-timing. It's simply to give clearance between the distributor vacuum-unit and your chosen generator.
Anyway. I've now got that part correct and stick a dizzy back on and the rotor-arm is 180 degrees out. It's pointing to #4 lead in cap. No big deal as you can get it pointing to right position if you turn engine once but this then means that the guidance in the manual if wrong or there's something wrong with the distributor.
Both options are unlikely. Would someone have turned the drive/dogs on the distributor-shaft 180 degrees and the manuals are usually right even when you jump to the conclusion that they are wrong.
What I'm thinking is that the WSM manual should advise that the large segment of the pump-drive is towards you, not the small segment.
Anyway. I'll have a closer look at the distributors I have tonight and check if the arm could be positioned incorrectly but I think that would require someone to have turned the cam on its shaft and I doubt that could be done easily
engine back in stand
WSM photo shows rotor-arm should be around this point when #1 piston at TDC and pump-drive in correct position
mine was nowhere near the position shown
WSM shows where slot should sit (viewed from above)
slot in my pump-drive was almost vertical
slot with engine turned one revolution (small and large segments change place)
WSM also says small segment of drive should be in this position viewed from under engine
close-up is a bit confusing. dot indicated is probably drive-pin
my drive repositioned to correct angle (for Dynamo condition)
distributor put back on shows rotor-arm pointing to wrong position (#4 lead)
firing positions/order (arm moves anti-clockwise)
engine turned one revolution has arm pointing to correct lead
I have it in the completed stand (avec wheels) and am putting the head on (soon) but have run into a couple of quirks doing so.
Am not sure why (checking timing?) but I put a distributor on and noticed the rotor-arm wasn't pointing where it should be (per WSM photo) despite having correctly followed the instruction for inserting the pump-drive in relation to the crank.
Once I'd accepted I'd done something wrong it was back off with the sump and do the pump-drive thing again making sure that #1 piston was at TDC
It didn't take that long tbf and the slot on the drive (for the distributor dog) is in correct position of 55 degrees. Interestingly there is a different setting if you are using an alternator instead of a dynamo. The drive needs to be set one tooth out to give an angle of 77.5 degrees.
This is actually nothing to do with the ignition-timing or valve-timing. It's simply to give clearance between the distributor vacuum-unit and your chosen generator.
Anyway. I've now got that part correct and stick a dizzy back on and the rotor-arm is 180 degrees out. It's pointing to #4 lead in cap. No big deal as you can get it pointing to right position if you turn engine once but this then means that the guidance in the manual if wrong or there's something wrong with the distributor.
Both options are unlikely. Would someone have turned the drive/dogs on the distributor-shaft 180 degrees and the manuals are usually right even when you jump to the conclusion that they are wrong.
What I'm thinking is that the WSM manual should advise that the large segment of the pump-drive is towards you, not the small segment.
Anyway. I'll have a closer look at the distributors I have tonight and check if the arm could be positioned incorrectly but I think that would require someone to have turned the cam on its shaft and I doubt that could be done easily
engine back in stand
WSM photo shows rotor-arm should be around this point when #1 piston at TDC and pump-drive in correct position
mine was nowhere near the position shown
WSM shows where slot should sit (viewed from above)
slot in my pump-drive was almost vertical
slot with engine turned one revolution (small and large segments change place)
WSM also says small segment of drive should be in this position viewed from under engine
close-up is a bit confusing. dot indicated is probably drive-pin
my drive repositioned to correct angle (for Dynamo condition)
distributor put back on shows rotor-arm pointing to wrong position (#4 lead)
firing positions/order (arm moves anti-clockwise)
engine turned one revolution has arm pointing to correct lead