Pony Racer
Member
Let start from the beginning. (This will be long)
2016 purchased The boat. The previous owner had all the props and shaft trued up. Silky smooth. He also had an issue with the Cool fuel Module on the port motor had injectors cleaned only on that motor.
when I go the boat bot motor max rpm 4900+ rpms. Over the coarse of a few months the starboard motor started running richer at idle and had a “skip” around 1100 rpms and wouldn’t get past 4600 rpms which I thought was a dinged prop because I lightly bumped a sandbar while idling through an area. My mechanic assured me it wasn’t the prop or running gear but the injectors are clogged as he worked on the boat for previous owner. Checked injectors and there were plugged bad. Pulled cleaned injectors. Roughness went away. Boom back up to 4900+ both motors.
Slowly over the next 2 years the issue came back but was worse on starboard side.
Beginning of last season both engine barely made it to 4500 rpms. 1100 rpm vibrations. Etc. I pulled out both Cool fuel modules and replaced them with the latest ones available. Ran the boat for about 5-10 hours to push anything in the lines to the injectors and the had nothing engine injectors cleaned and rebuilt. Both engines shot up to 4800+ rpms. Smooth as they can be and ran great. Until about 3 weeks later. The starboard motor started to loose top end rpms. By the end of the year it wouldn’t get past 4600. Over winter I checked all the plugs everything looks normal. No issues with plug wires. Etc. now the starboard engine won’t push past 4300. Jumps right up to 4300 with no issues with 3/4 throttle , push the throttle past that one motor won’t go past 4300. The port one shoots up to about 4700 (the other motor is dragging it down)My mechanic said it’s my running gear or growth under the boat. And wants me to haul the boat and drop over $4000 to pull props and shafts retrue everything. Diver under boat said bottom clean no dings in props shafts for what he can tell spin true and no movement in cutlass.
I believe there is something wrong with that motor. Flame arrestors are clean Plates are opening to full. Fuel burn is normal for rpms.
No codes!!!!!
what else can I check.
This is aggravating it’s not the running gear or dirty bottom.
2016 purchased The boat. The previous owner had all the props and shaft trued up. Silky smooth. He also had an issue with the Cool fuel Module on the port motor had injectors cleaned only on that motor.
when I go the boat bot motor max rpm 4900+ rpms. Over the coarse of a few months the starboard motor started running richer at idle and had a “skip” around 1100 rpms and wouldn’t get past 4600 rpms which I thought was a dinged prop because I lightly bumped a sandbar while idling through an area. My mechanic assured me it wasn’t the prop or running gear but the injectors are clogged as he worked on the boat for previous owner. Checked injectors and there were plugged bad. Pulled cleaned injectors. Roughness went away. Boom back up to 4900+ both motors.
Slowly over the next 2 years the issue came back but was worse on starboard side.
Beginning of last season both engine barely made it to 4500 rpms. 1100 rpm vibrations. Etc. I pulled out both Cool fuel modules and replaced them with the latest ones available. Ran the boat for about 5-10 hours to push anything in the lines to the injectors and the had nothing engine injectors cleaned and rebuilt. Both engines shot up to 4800+ rpms. Smooth as they can be and ran great. Until about 3 weeks later. The starboard motor started to loose top end rpms. By the end of the year it wouldn’t get past 4600. Over winter I checked all the plugs everything looks normal. No issues with plug wires. Etc. now the starboard engine won’t push past 4300. Jumps right up to 4300 with no issues with 3/4 throttle , push the throttle past that one motor won’t go past 4300. The port one shoots up to about 4700 (the other motor is dragging it down)My mechanic said it’s my running gear or growth under the boat. And wants me to haul the boat and drop over $4000 to pull props and shafts retrue everything. Diver under boat said bottom clean no dings in props shafts for what he can tell spin true and no movement in cutlass.
I believe there is something wrong with that motor. Flame arrestors are clean Plates are opening to full. Fuel burn is normal for rpms.
No codes!!!!!
what else can I check.
This is aggravating it’s not the running gear or dirty bottom.
