225 on a 23
 

how fast does your 23 go witth a 225? my 23 scepter with full tank and 4 guys plus gear goes about 27mph at WOT and it it just seems to slow
Thanks

That seems way low, assuming theres nothing wrong with the motor you probably have the mounting height wrong or the prop is off. How many rpms are you turning WOT?

Something is definitely out of whack. My father's Sceptre with a rebuilt '96 carb'd Yammie 225 would run 39-40 in the corner. That engine had great midrange so it pushed the boat consistently at that WOT speed regardless of load. I believe you have an older Johnson looper on yours. He had the Evinrude equivalent ('89) prior to the Yam and it too would push the boat to 40. If all was well with your engine, given the load you describe, I would expect 35-37 at least.

its an 89 225 johnson vro WOT rpms are 5700 i believe or maybe 5200 haven been out since last summer. the engine is rated for 6100 rpms max. the fastes i went was 40 with no gear half tank and 1 other guy when i went for a test run.

Me too with a 1988 Yami 225 2 stroke. WOT is 38 mph at 5200 rpm - 17 Pitch alum

You should be able to hit 40 mph. Your cruise should be 28-30 mph.

I have a 23, not a sceptre, but I could see that happening with weight. My top speed with light load is about 38-40. I don't usually have 4 guys on the boat, but I've had 3 with a full tank and enough ice, bait,chum,food and drink onboard for 3 days. My top speed then was probably close to 27 to 30 mph. I guess it depends on how big the guys were and what the gear was.

Time to do a compression test and check for spark on all 6. Something is very wrong. What prop do you have on that boat?

just agreeing more, my 225 F225 cruises at 27 mph and 4000 rpm with plenty of throttle left. Need to know your rpms and your prop pitch, it might just be the wrong prop

I had a '74 Tsunami (same as the Sceptre) with a Johnson 225 Looper, 1.86 gear ratio, at 5800 rpms turning a 15" pitch OMC SST prop, and loaded with 4 adults and 5 kids aged 8-17 on the boat, plus 100 gallons of fuel, and we could get 35/36 mph WOT with that load, 24 mph cruise at 4000 rpms. Two fat guys and fishing gear it was 6200 and 40 mph, cruise was 26 mph.

Tim is right (again).