Ran that gas until empty. Refilled with 1:50 but strongly suspect they had it at 1:25 or even higher. Ran lousy. Cleaned carb. Still lousy and hard to start. Took it apart and everything carbonized. Pistons and cylinders scourced. Rings shot. Pissed off that the one time I asked someone else to do the mix it ruined the engine. Pissed at myself I didnít pick up on it before damage done.
I'm not sure these are related. Even if it went the other way, and they used 1:100, it seems unlikely that type of damage occurred in such a short time. 1:25 would maybe smoke a bit, but shouldn't have done so much damage so quickly. I suspect either there was damage pre-existing that finally manifested, or the internals were not fogged and got rusty, which did some damage on initial running at speed.
Now have a EFI 9.9hp Suzuki. Got it for 30% less than Iíd pay in the states at Rodney Bay but new 2019. Apparently not popular in Caribbean. Heavy c/w prior tohatsu but uses no gas and runs great. While in states got every spare/filter I can think of to bring back.
It is good to have spares, but beyond filters and impeller for that engine, you probably won't be needing them.
Weight is always a contentious issue. The truth is that there is very little weight difference between 4-stroke and 2-stroke in this size range when apples are compared to apples. For example, your 9.9 is the exact same engine as the 15 and 20. Same size and weight - difference is only in the computer. The Suzuki 20 only weighs 8lb more than the ever-popular Yamaha 15. But you get another 5hp, and no carb issues for that 8lb. Same for the Tohatsu. But the reality is that any difference in weight for engines this large is practically meaningless because they aren't being man-handled around like smaller ones are. Nobody is going to be lifting by hand these engines on and off a dinghy regularly.
Please share your outboard experiences. So far merc sucks, tohatsu is very sensitive to mishandling, Yamaha is fine (big theft target) but expensive as is Honda, and for present Iím a Suzuki fan. Whatís your opinion?
We had a Honda 15hp 4-stroke and it was good. Quiet and smooth. It got rode hard and put away wet, and ran for many years before it just got too tired for our use. Bought a Suzuki 20hp EFI 4-stroke. It has been a very good engine. Not quite as quiet or smooth as the Honda, but uses 25% less fuel. It uses 50-60% less fuel than all our friend's Yamaha 15 2-strokes. The difference in fuel consumption is astounding. One advantage of EFI is that the computer only provides exactly the amount of fuel needed at any given time. When running at constant throttle, it leans the fuel air mixture way back and the engine just sips fuel. We go forever on the 3 gallon tank, and 6 months using it long-distances every day sees us using a total of 12 gallons for the season.
As for what is common where, the Western Caribe has a large number of Suzukis. They seem to be as popular as the Yamahas there. Suzuki has made a big push to get them into the locals hands. I'm seeing a huge number here in the US. But I've never understood that argument anyway. There is very little about a small outboard engine that is brand-specific to the extent that you must find a person trained and experienced only on that brand. As for parts, there are few parts carried by dealers anymore. Everything is drop-shipped because inventory is expensive. One should have common maintenance stuff on board, but if you need something like a camshaft, all any dealer is going to do is order one and have it Fedex'd in - same as you would. Maintenance stuff is easy to reorder in advance, and some of it, like impellers and waterpump housings, spark plugs, and a few other items, are common across several brands.
Yes the efi adds weight
What would add weight about it? The injectors and other components are light plastic parts, and the computer is small and light. Besides, you save much more weight in carrying around less gas in the dinghy.
EFI is not for me as I like to fix things myself. They do run great though and sip fuel.
Here is the thing about EFI - the fuel system is bullet-proof. No carburetor, and a sealed fuel system. Everything else about the engine is like every other engine. So there isn't anything that ever needs fixing on the fuel system, like those carburetors everyone is always cleaning and having trouble with and adjusting all the time, and the mechanical components are no different.
Had an in line filter in my gas line when I was using 2 strokes. Now it says you canít use them with EFI engines. Why? Anything you can use?
That's news to me. We have run our Suzuki EFI with a filter between the tank and engine since new. There is nothing in the manual about not doing so. There is also a replaceable inline filter on the engine itself.