thunderbolt!
Recruit
- Joined
- Jun 30, 2016
- Messages
- 4
Hello everybody,
First I have to apologize for my not so perfect English. I'm from Germany, but I will do my very best
I own a Mercury 500 Thunderbolt from 1977 (serial# 9136259) Originally a manual start model, it was upgraded to electric start a few years ago.
I think my timing is not optimal. One reason: my butterflies are at full throttle only 50% open...
TDC, which I have found by the dead stop methode, is pointing to the marker. So the new flywheel was correct installed. On the old flywheel there is a decal (see picture 1) with a bold line at 1? BTDC.
My first question is, is that the "real" TDC or has this mark another purpose?
Furthermore there is another decal on the engine (picture 2) which says ".172 B.T.DC. 30?" I Think the 30? is the max. spark, but what does .172 mean?
Thanks in advance! And greetings from Germany!
Hendrik
Pictures:
First I have to apologize for my not so perfect English. I'm from Germany, but I will do my very best
I own a Mercury 500 Thunderbolt from 1977 (serial# 9136259) Originally a manual start model, it was upgraded to electric start a few years ago.
I think my timing is not optimal. One reason: my butterflies are at full throttle only 50% open...
TDC, which I have found by the dead stop methode, is pointing to the marker. So the new flywheel was correct installed. On the old flywheel there is a decal (see picture 1) with a bold line at 1? BTDC.
My first question is, is that the "real" TDC or has this mark another purpose?
Furthermore there is another decal on the engine (picture 2) which says ".172 B.T.DC. 30?" I Think the 30? is the max. spark, but what does .172 mean?
Thanks in advance! And greetings from Germany!
Hendrik
Pictures:
Last edited: