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If your numbers are correct, your current prop is slipping badly -- that is, not getting a good bite in the water. Assuming your engine is healthy, you should be seeing upper 30's at 4900 rpm. I think your current prop is too small in diameter, too large in pitch, and doesn't have enough blade...

How are you measuring speed? GPS = accurate, Yamaha dash gauge = a wild guess that could be very low if the pickup tube is partly clogged.

Looks like you are docked at Perry Cabin in St. Michaels... nice place!

How are you measuring speed? GPS?

I may have the same set up as you, but different model year. Mine is a 2001 228G with a 2001 Yamaha HPDI 200 2-stroke. When I bought the boat a year ago it was improperly prop'd. It had a 4-blade aluminum 15.5" diameter x 19" pitch. Result was slow hole shot and 33 mph top speed at 4400 rpm...

You can always put fresh plugs in and take it for a spin... see if that makes a difference before going down the path of checking the injector. If your injectors were cleaned and flow & spray pattern tested recently, then I would start on the electrical side of things and make sure all...

If it worked that way in a DFI 2-stroke, the bottom end (crank, connecting rods, cylinder, rings, etc.) wouldn't get oiled...

HPDI's inject oil into the crankcase and it combines with the airflow as part of the intake charge. Lack of fuel would not cause wear to cylinder & rings as y'all are suggesting. I think the culprit is a bad injector -- one that is stuck shut so you have zero fuel entering the combustion...

Most marine supply shops (West, Defender, Jamestown, etc.) sell pre-made anchor rode. 25' - 30' of chain with 250'+ of line are readily available. As far as what anchor will fit your bow pulpit (not a davit, btw), I can't help you there. But generally, danforth anchors don't sit very nicely...

Watching this thread. I can't help you out since I also have a 200 HPDI on my 228, but I am very interested in the same 3 repower options as I will replace my engine in a year or two. The Mercury V8 intrigues me as it is the lightest of the 250 HP options and with V8 torque it should perform...

I have a 3-blade Solas Titan HD 14.5 x 17 on my 228. It matches up well with the two-stroke HPDI 200. WOT at 5100 is 41mph on smooth water. 3800 is slow plane (22-24 depending on sea state). 4100 is a good cruising speed at around 28mph.

I’ve had both bunks and rollers on previous boat trailers. And have bunks with my 228. I prefer bunks as they are dead simple and rarely have issues. Also in my experience with bunks you can get the boat to sit lower on the trailer, which reduces the water depth needed to float it off. I...

If you love the boat and plan to keep it another 10+ years, buy the new engine. Don't listen to those rational people, they don't know how crazy us boaters are...

I believe the OP is asking about cutting a hole in the fuel tank itself to improve access for inspection purposes. Cutting a hole in a gas tank can be very, very dangerous. Any spark or too much heat will lead to a disastrous outcome, even if you have pumped all the gas out. The fumes...

I use a pair of these: https://www.amazon.com/gp/product/B082DCMFZS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 One for each battery. They work great and keep the batteries topped off all year round.

Sounds like a Yamaha aluminum prop -- 14.5" diameter by 17" pitch. I know you said it is "steel"... but are you certain? Aluminum props don't work well on heavy boats as they deflect too much under load. Your boat must be very heavily loaded given you struggle to stay on plane at 4800 rpm...

Thanks... great info. Hopefully I won't experience problems with upper rev range power, but if I do you have provided an excellent tutorial on how to diagnose and correct. Much appreciated. If you read through the rest of this thread you will see that my problem has been solved. The root...

What is the diameter and pitch of your current prop?

Replacing the O2 sensor and adjusting the oil pump linkage seems to have done the trick. The oil pump linkage was set 1/4" too long and causing over oiling at idle / low revs. The engine is running very nicely now with a smooth idle and no surging as I slowly throttle up and no blue smoke at...

I'm a little tardy with an update. I cleaned the O2 sensor, chamber, and the "spindle" tube (I don't know its official name). I ran the boat this past Saturday and low RPM running is somewhat improved, but still a bit rougher then I would like. I have now replaced the O2 sensor with the $30...