DJRazorback
Member
I have a 2015 Nitro Z6 with the Mercury Optimax Pro 115hp and a Mercury Marine Laser 2, 48-16992 22P prop with 2 plugs in and one out. It also has a SE Sport 400 Hydrofoil that I added shortly after buying the boat to help it get up on plane.
I have an issue that I haven't heard of before so I'm hoping someone on the forum has run across this and can help. The boat has always run about 40mph at 4,000rpm when properly trimmed out. The last 2 times I took the boat out it came out of the hole just fine, planed out and cruised at the 4,000rpm that I normally run. But after a few minutes the rpm jumped to 4,500 and the speed dropped to around 35mph. The trim was still set the same and the throttle had not been touched. The motor sounds fine (other than being at higher rev's) but the boat is definitely going slower. I pulled into a cove to check the prop and nothing appeared to be wrong. So I started the motor back up and got the boat back on plane trimmed it out and set the throttle at 4,000 rph and was running just fine at approx. 40mph. Then as I turned out of the cove it did it again. The rpm jumped to 4,500 and the boat slowed down. I don't want to speculate but could it be lower unit? Or the prop slipping? Doesn't make sense to me being as it comes out of the hole, planes out and runs fine before the problem appears.
I have a special trip planed for few day in October on Lake Ouachita with my son and it's very rare that our schedules align so the we can both take off from work and family. Need to get this fixed before October. Help!!!
I have an issue that I haven't heard of before so I'm hoping someone on the forum has run across this and can help. The boat has always run about 40mph at 4,000rpm when properly trimmed out. The last 2 times I took the boat out it came out of the hole just fine, planed out and cruised at the 4,000rpm that I normally run. But after a few minutes the rpm jumped to 4,500 and the speed dropped to around 35mph. The trim was still set the same and the throttle had not been touched. The motor sounds fine (other than being at higher rev's) but the boat is definitely going slower. I pulled into a cove to check the prop and nothing appeared to be wrong. So I started the motor back up and got the boat back on plane trimmed it out and set the throttle at 4,000 rph and was running just fine at approx. 40mph. Then as I turned out of the cove it did it again. The rpm jumped to 4,500 and the boat slowed down. I don't want to speculate but could it be lower unit? Or the prop slipping? Doesn't make sense to me being as it comes out of the hole, planes out and runs fine before the problem appears.
I have a special trip planed for few day in October on Lake Ouachita with my son and it's very rare that our schedules align so the we can both take off from work and family. Need to get this fixed before October. Help!!!