I added a cold start kit to my QM15 after doing injectors and valves. It works great in Seattle in the middle of winter.Easy installation. Price was between $200 and $300 and it starts like a gas engine. Rarly use it since doing a one way to Hawaii{18 days from Newport Oregon}. I can't find a phone number for the supplier,But I think that Gallery Marine in Seattle can find it. 206 547 2477