According to the ads they are same for HA1,HA2, HA3, HA4 http://www.ebay.de/itm/Honda-Acty-Ignition-Coil-HA1-HA2-HA3-HA4-/181651634629 here $150 http://www.honda-acty-parts.com/honda-acty-ignition-coil-ha1-ha2-ha3-ha4 https://www.minitruckgarage.com/honda-acty.html Also check on LOC8PART.com for a cheaper solution http://www.autoparts.loc8apart.com/nav/auto-part/Honda/Acty/Ignition-Module.php
Aftermarket, Made in China, google search for 90048 - 52084 ignition coil or Diamond F-604 Looks like the part number is from a Daihatsu http://www.3x-autoteile.de/index.php?products_id=156-29913 DAIHATSU 90048-52084, Descripition: Brand DAIHATSU, Part Number(s):90048-52084, ProductName:Ignition Coil , Cross Interchange Parts Factory Number ERA 880253 FISPA 85.30283 MEAT & DORIA 10434 SIDAT 85.30283 HOFFER 8010434 TESLA CL563 http://www.yoyopart.com/oem/5859398/daihatsu-9004852084.html#application
One consideration... as your picture shows, when they're mounted down on the 'frame' they can really get beat. For the re-install, maybe consider moving it to up under the left seat... out of the elements it should last practically forever. Might require a slightly longer coil lead to the distributor.
Picked up a universal coil a the auto parts store. Worked like a champ. Monte it on top of the engine. Thanks guys. Anyone have a service manual for this old terd. Alternator is shot and I would like to change the timing belt. Looks like I need to drop the engine.
Title Honda Acty English Factory Service Manual Author James Danko Publisher Lulu.com ISBN 0557027993, 9780557027996 sample pages https://books.google.co.jp/books/ab...ervice_Manua.html?id=WhhKAgAAQBAJ&redir_esc=y here are some for sale http://www.amazon.com/Honda-English-Factory-Service-Manual/dp/0557027993 For part number and drawings see here http://www.epc-data.com/ http://www.lingshondaparts.com/honda_car_parts_block_selection_C30.php?mod_01=7238 or search by VIN, 17 digits long http://www.lingshondaparts.com/honda_car_parts_select_VIN_C20.php