I pulled the plugs and 2 was badly fouled. My dealer buys it in bulk and I get it for 26. Great for bass and multi-species fishing boats. A test ride last night still finds the problem alive and well. I ran about 3 miles at speed and it ran smoothly. That said, the Opti is significantly noisier especially when starting and at idle than the other engines, and sometimes produces a burnt oil smell when trolling with the wind and vibrates at low speeds. So I've been using the premium plus with no issues.
Prop ventilation when tilted up? List of models 185 hp 7,500 rpm 1498 cc 941 kg 215 hp 8,000 rpm 1498 cc 941 kg 250 hp 6,000 rpm 3000 cc 941 kg 250 hp 3000 cc 1383 kg 310 hp 7,300 rpm 2x155 hp 2996 cc 1256 kg 370 hp 7,500 rpm 2x185 hp 2996 cc 1256 kg 155 hp 7,300 rpm 1498 cc 660 kg 215 hp 8,000 rpm 1498 cc 660 kg 130 hp 6,850 rpm 947 cc 571 kg 155 hp 7,300 rpm 1498 cc 660 kg 215 hp 8,000 rpm 1498 cc 660 kg 240 hp 6,000 rpm 2500 cc 957 kg 200 hp 5,750 rpm 2500 cc 957 kg 240 hp 6,000 rpm 2400 cc 1057 kg 250 hp 6,000 rpm 2500 cc 1057 kg 250 hp 3000 cc 1057 kg © 2000-2019 DealerCorporation. It has since been confirmed that this is supposed to live in the counterbore in the flywheel to protect the nut on the end of the crank from rust. I won't own another one - you do what you want. Check control cable adjustments 10. I thought about the batteries. So I slow down, stop, and then come back up to speed again and she runs fine, until the next wave or gremilin does it again.
The various sensors indicated no problems, eng temp is good, water cooling pressure good, telltale flow is good etc. Not much happening that has a fuse on it when the motor is running. I put a 25 amp fuse and the motor is running with no issues. I will update here as soon as I can try out the boat with the new harnesses, hopefully this weekend if the weather permits. You could test this by changing propellers. It was 33 dollars or so last month at Bass Pro.
How do you know it is the right prop; 1. The thing ideled like junk , and was hard to start , something Im sure efi helped with , but internaly Im sure they were the same engines , pistons ,cranks ,starters, generators and the like. I will consult with Whaler and see whats up. My initial thought was that I was using the steering column mounted trim switch and waybe there was a short. I had a friend with an early 200 Opti on a bass boat and it was flawless for him. But the primer bulb is past the heavy fuel tank 3 way manual switches whaler installed in the transom so its also still possible I guess there is an issue with the primer bulb check valves.
The Yamaha, Suzuki and Optimax all require an initial 20 hour service and then a service once a year or every 100 hours. While this may be the case, until you confirm this you may be focused on ignition when you acually have a fuel related problem. I have about 100 hours on my Opti and it has been great. His conclusion was that we have a common engine issue probably the fuel flow inside the Vapor separator tanks as he did not notice any obvious prop ventillation when he looked over the transom. To all - tnx again for the ideas. On thing that can play havoc with troubleshooting Optis is battery voltage. I finally ended up with a brand new 2003 motor, which ran good for 110 hrs.
On a choppy lake, a battery can have intermittent cells short out and drop voltage. Alternator was check and is good. Barry - I have not tried to trim down the engines during the problem while on plane. As I understand it the 2005 power heads were only coming off the assembly line for about two weeks at the time they pulled this pair and sent them to me. I looked at the wiring on the motor and see that nothing seems out of place.
Great for bass and multi-species fishing boats. And please keep us posted on the results. I can't believe I am the only person with this 2001 and twin 200s that runs a boat on Ontario. Since the engines are rebuilt by a delaership, the people at Mercury who arranged for this re-installation should be contacted. I'll email him to make sure he sees this.
The wires from the fuel gauge are co-located with the ignition key, which is fed by the main motor fuse that was failing. My only gripe is that it is a noisey sucker compared to many other high tech outboards. My vote now is for fuel system issue. Engine performance, speed and fuel use can vary radically depending on the prop used. Here's the situation: No issues starting the engine when first putting in at the ramp, and no issues when first running down the lake. The fuel mileage is best in class.
The speed jumps were all in response to propeller ventilation. The Nitro is up and running and ready for the water. It happend a dozen times in 2 to 3 foot chop, about 5 or 6 times on each engine in an hour or so. The problem is still there. It is when the motor sits there for long periods of time that the impeller goes bad. Yet with trim partially up it's not too many good whacks before the problem shows up-- and if the whacks continue for another minute it will eventually catch one to put it back to normal.