Water testing 40+ and Silver Century
Posted: Fri Nov 01, 2019 10:59 pm
So I was water testing the auld Picton that I'm "restoring",so decided to kill two birds with the one stone and finally take the gulls out for a spin and test them as well.
40+ ran great,didn't push the 15' planing hull very well,but hey,it worked.
Silver Century not so good,even with nice shiny Amal carb.Both have Wipac 2 ignitions.Fuel was 10:1 for both.
It would run but get the revs up. And if I rattled the tickler,it would pick up a little but not much.
So back home,I cleaned everything,from tank to carb jets.A wee bit of gunk but nothing that would restrict fuel,checked points and plug gaps to .5mm.
Fired her up in the tank,no improvement,would only stay running if I left the choke on.
Twist grip opens throttle all of the way as far as I can see, points cleaned and set to .5mm, plug cleaned and set to .5mm, compression 60psi on an old tester which I know is reading low,about 10 - 15 psi.I compared it before with new tester belonging to friend.
Only anomaly is the points spark speaks in forked tongue,strong and blue but as if it hits the outer edge of the points face with a gap in the middle of the spark. Wipac on it's way out? Now I had noticed this before the outing.
Another question,if the Amal carb was jetted for 25:1,would this affect performance as the fuel I was using was closer to 8:1 than 10:1,TCW-3 oil.
And on that,I have,brand new in the packet,conversion kit 25:1jet for Amal 46N.What is the tell to know which is 25:1 and which is 10:1, as the one in the packet looks exactly like the jets in both carbs I have?
I though I had videoed it but me and touch screens don't get on too well,so it seems I didn't record anything Any advice greatly appreciated.
40+ ran great,didn't push the 15' planing hull very well,but hey,it worked.
Silver Century not so good,even with nice shiny Amal carb.Both have Wipac 2 ignitions.Fuel was 10:1 for both.
It would run but get the revs up. And if I rattled the tickler,it would pick up a little but not much.
So back home,I cleaned everything,from tank to carb jets.A wee bit of gunk but nothing that would restrict fuel,checked points and plug gaps to .5mm.
Fired her up in the tank,no improvement,would only stay running if I left the choke on.
Twist grip opens throttle all of the way as far as I can see, points cleaned and set to .5mm, plug cleaned and set to .5mm, compression 60psi on an old tester which I know is reading low,about 10 - 15 psi.I compared it before with new tester belonging to friend.
Only anomaly is the points spark speaks in forked tongue,strong and blue but as if it hits the outer edge of the points face with a gap in the middle of the spark. Wipac on it's way out? Now I had noticed this before the outing.
Another question,if the Amal carb was jetted for 25:1,would this affect performance as the fuel I was using was closer to 8:1 than 10:1,TCW-3 oil.
And on that,I have,brand new in the packet,conversion kit 25:1jet for Amal 46N.What is the tell to know which is 25:1 and which is 10:1, as the one in the packet looks exactly like the jets in both carbs I have?
I though I had videoed it but me and touch screens don't get on too well,so it seems I didn't record anything Any advice greatly appreciated.