I run an onboard glow on all my larger 4 strokes. It's great no holes in the cowl. You just need to step out on the line with a starter and away you go. Just a small pc board and a single cell for power. It helps it run smoother on the low end especially when inverted, because the glow is always hot on the low end.

Check it out.
http://www.42-percent-products.com/glow-accessories.htm