I have a Homelite VAC Attack II that dies when you increase the throttle after it has warmed up for about 5 minutes. Any ideas?

remove the small wires from it and spin the engine over if still no spark the coil is bad

fit new pump ad float diaphragms in the carby
the fuel mix has become irrelevant as Stihl have an oil that is a 50:1 oil and covers all ratios and mixtures
do not use any e-mix fuels as that destroys carby components

try some SeaFoam in the gas may help

My Homwlitw Attack ii won't start. Spark plug is dry even after priming more than 10 times. Where so I start? Thanks, Fred

50:1, I happen to have the owner's manual.

try to adjust hi speed/ low speed on carburetor

Proper gap is .030 inch.

Hope this helps,
Dolf-

Yes it will use a fuel mixture of 40:1(3.2 oz of two cycle oil to 1 gallon of gas). Any fuel sitting over 30 days now is considered bad fuel. All the manufacturers schools this year and told us this. We are finding it to be true.
Good day.

The mix that I would use is one ounce of two cycle oil per quart or four ounces of two cycle oil per gallon of unleaded gasoline. Hope this helped and best wishes.

Here's an online manual you can download to walk you through it.
http://lawnandgarden.owneriq.net/manuals/mfg/homelite/vac_attack_ii_blower_vacuum_zr08107.html

Hope this helps.