The following table was created from information taken directly from an original parts and repair list printed by Associated Manufacturers Co. in January 1927 for AMANCO engine owners in Great Britain.   This includes all engines both Regular and Iowa Oversize.  The reason for the table was to show what type trip was used according to certain hammer stop styles and positions used on various styles of igniters originally installed on Associated engines.  Each of the three groups shown below: Straight trip, No Cam, Cam On Trip Rod and New Style Trip had a different hammer stop or position on the moving electrode in the igniter.  There was also another style represented for paraffin engines (Throttle governed kerosene) which was merely the igniter hammer stop for the new improved G 340 "Goose Neck" in the "points closed" position, which leads me to believe that all TG engines were powered by magneto (No battery models)
Another interesting feature of the TG engines is the style of igniter. The points extend deep into the pocket of the passage leading into the cylinder. I suppose to create better ignition of the lower grade kerosene fuel.

<< This Pic Shows The Extended Points On A TG Style Igniter

This Pic Shows The Cam Used To Assist Tripping The Igniter >>>

Trip styles According To Serial Number
Engine Size / Type Straight trip, No Cam

Cam On Trip Rod

New Style Trip Introduced
1 1/2 HP WC

All Thru 259967


Starting 259967

1 3/4 HP AC

All Thru 34713


Starting 34713

1 3/4 HP WC

All Thru 317151


Starting 317151

2 1/4 HP AC

All Thru 156393


Starting 156393

2 1/4 HP WC

All Thru 132830


Starting 132830

3 HP


500001 Thru 502856

Starting 502857

4 HP

All Thru 405362

405362 thru 408526

Starting 408527

6 HP

All Thru 606668

606668 Thru 608951

Starting 608952

8 HP

All Thru 800607

800607 Thru 801358

Starting 801359

12 HP

All Thru 900641

900641 Thru 900995

Starting 900996

As with any of these engines, there are exceptions. Nearly all late style parts are interchangeable among all earlier engines.
One note worthy of mention is the overlap of the straight trip with the introduction of TG engines. This happened for only a very short period of time from about January to June of 1916. So not many exist.