Hello everybody, i recently bought a boat with a 70hp force engine. i have two questions:<br />-where do i find the serial number? on/in the engine i find several numbers,the number i have on the original engine papers i cant find(just numbers,and on the forum i saw combinations of digits/letters.<br />-can i use the engine output nippel for the speedometer,or can i better use a external device<br /><br />thanks barry