Homelite ht-17 magneto

2 stroke tools generally run at 50:1
100ml of oil in 5L of petrol

50:1 100ml of oil to 5L of petrol

32:1

it sounds like your throttle cable is to long i have the same problem with mine... when starting up pull the throttle full on with your finger whilst you have it set on choke. best to do this on a very flat surface.

The gap on my 18 year old Homelite ST-185 is 0.025. Since they are still using simple and reliable magnetos, yours should be the same.

40:1 gas/oil mixture

Normall setting is 10 thou but if there is no play in the crank bearings you can set at 8 thou

Hello daniel_s_kmi:

If I Understand you, you are Looking for the Part Number for the Complete String Head.
If this is Correct, then the Part Number is DA3001A.
>>You can View a Breakdown of this Unit at this Site Addy; http://www.homelite.com/service_support and Select Order Parts. Now Select "Click to Launch Homelite Catalog". Now Enter the Model Numbers (UT-20721) and Click Search. Now Double Click on the Model in the Results Area. Now you can View the Breakdowns for this Unit. Select the "Shaft-Spool and String-Grass Deflector" File. The Complete String Head is # 17 in the Breakdown.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

Homelite shows the short block assy ($84.02) but no breakdown of the top end. I've never taken one apart, not cost effective. Here's the link to their parts site. Have the UT number available

http://www.homelite.com/service_support/order_parts

Go to www.homelite.com then in the red up top click on order parts then click launch to parts catalog then scroll down to accept agreement and then you will need to enter your model # and then you can go thru the list of breakdowns and get your part # from the diagrams.