just bought a triton tr-18 with a 1999 xr-6 150 ser OG815652 the boat has not been used very little. It has not been on the lake this year until today engine started very easy idle good went up lake slow because it had not been run this year from what the owner told me it has been on the lake about 10 time in the past 4 years it run good for about 2 miles and it started beeping turned engine off and started trolling back in after about 10 minutes started up not beeping but started beeping again turned it off and trolled in need help.