"recycling" mowers

So i'm a bit bummed'. One year ago, I bought a new Toro 6.5HP recycling, self propelled mower. I have to cut the grass every 4-5 days, any longer than that and the mower will choke itself to death on the clippings. Multiple times while cutting the lawn, I have to use plastic blade and scrape out the grass clippings. The mower mulchs, but it appears that most of the mulch simple sticks to the insides of the mower, so much so that it dies until cleaned out. Question: is this normal for mulching mowers? I don't think I can justify another mower purchase to the wife just yet.