Picked up a 2001 2 stroke 25 merc and am looking to upgrade the prop... I was thinking on getting a stainless, however a buddy of mine is telling me not to get a stainless considering the majority of my running will be in rocky areas and if I were to hit such said "rocky areas" with the stainless, the risk of breaking my shaft is higher with the stainless vs aluminum. Any thoughts on this? Starting it up, she doesnt start shooting a steady stream for about a minute.... Mechanic said it had to warm up before the thermostat would open up? Another question I had was when I would check the temperature of the water coming out when it was "peeing", it seemed very warm especially when compared to previous motors I have owned.... The water pump and lower unit oil have already been changed.... any imput?