I also use straight and curved hemostats of various sizes and they work very well. After purchasing them, I used my Dremel and dulled the sharp tooth edges and beveled the edges of the jaws so they wouldn't cut into the hoses when gripping tightly. Also, keep an eye out because there are hemostats with jaw teeth that run in different directions. I don't remember all the different specific names for them, but some are good for pulling parallel to the length of the hemostat and some are designed for gripping and pulling perpendicular to the length of the hemostat. Ideally it is nice to have both, but I have found that hemostats with cross hatched jaw teeth (pretty good for all directions of pull) or else with jaw teeth that run the length of the jaws (grip when pulling perpendicular) are the most useful for small engine hoses.
Also, they might be a little out of the OP's price range, but I also use Knipex retaining ring pliers in straight, 45 degree, and 90 degree orientation for pulling and installing small hoses. They can get into really tight areas. Since they are round nosed pliers they also grip well without damaging anything. The smaller Tygon type hoses also fit almost perfectly in the crook created by the machining of the retaining ring tips. It makes it easy to pinch and hold a hose right at the end of the plier without it moving around on you.
Aircraft skin spoons are very strong and also very thin at the ends. If they are kept cool so they don't lose temper they can be thinned and ground into all sorts of shapes at the end in order to help with popping off/breaking loose stuck small hoses. They work much better than something like the Lisle hose pliers (linked to earlier) for small engine related tasks.
The Knipex pliers shown in the pictures are mine, but I don't have a picture of my skin spoons so I just posted a couple pictures taken from Goodle Images.