Hi Guys<br />Rob here from Wales UK,<br />Whilst not new to boating I am very new to inboards!<br />I have just purchased a 21ft cabin fishing boat made from grp,weight is approx 2800 lbs,has a med vee planing hull,and is fitted with a 135hp 3LTR mercruiser with an alpha leg..........<br />I use it on the sea and its kept in a marina...<br />yr of manufacture boat and engine is 2000,took her out for the first time yesterday and would like your opinions on the readings from the helm guages.....<br />Temp approx 160 when warm,did not go higher!<br />Oil pressure 30/40 when warm <br />,was higher cold!<br />Volts 13 running at 3000 rpm!<br />Max revs 4600<br />Max speed shown mph on speedo and GPS 36MPH at 4600rpm<br />Do these seem ok to you guys,the air temp yesterday was 70degrees....<br />Just a couple of other points...<br />What should idle speed be?<br />How much warm up time before setting off?<br />Oil viscosity to be used?<br />Diy servicing..yes or no? (Iam quite a competent diy mechanic)<br />Thanks to all,great site<br />Rob 