Hello everyone. I Have a Yamnaha F9.9 SH- 1987 4 stroke that i have rebuilt the carb and am having an issue with. Now this issue was present even before rebuild so iam assumming the issue is something else. Starts first pull -Idle comes up high till it warms up. Then it comes down to idle great and idle perfectly. Put it in gear and its fine. Throtle up but i cant get full throtle seems as its holding back. doesn`t stall out or anything just wont ramp up to full throtle. I checked the plugs replaced them. Linkages are got cable from tiller is good. could someone maybe kick in and give me some advice as to probable causes. OHH also how do you check and adjust timming on these motors. Thanks in advance