Throttle Cable adjustments
 

I am an overeducated idiot who just got a pair of fresh engines back from Tyler. Here's my problem;
The starboard engine needs alot more throttle to match RPM's with the port. At 4000 rpms the stbd throttle is about 1.5 inches ahead of port. At 5000 rpms its 2+ inches ahead.
Sometimes I can get enough throttle to reach the Rev Limiters of 5600 rpms on Stbd... sometimes I just seem to run out of throttle. I can always bang them with the port side. I am currently trying some CNC 5 blades via Julie at TU. The stbd side feels like it has a way bigger prop vs. the port.
Both engines dynoed out within ten hp: 583 vs 573 @5500 rpm. Tourque @ 5500 was 557 port, 546 stbd.
Does this sound like a throttle adjustment problem, and if so, how can I correct it? other ideas?
A side note, with my original smaller props I can hit the rev limiters easily, but I do it with less throttle on port side.

Could be the props. I had this before with a bad pair. I would try out another set before messing with the cables.

If carbs. take the flame arresters off. With engines NOT running, take both throttles & go wot with them. Then look down carb throats. The blades inside both carbs should be wide open & the same angle. If one is opening more then the other there is an adjustment at the carbs. Different connections have different ways of adjustments. If you look at the cable you should see how to adjust it.

Same outdrives?

Bravo 1's with 1.5 gears

Did as you suggested, they both open up perpendicular to the carb bodies...

When both throttles are wide open while running boat in the water, do both engines spin the same RPM? That will let you know if an engine is down on RPM or if a prop is pitched different then the other.
The first thing you need to determine is if it truly is an adjustment issue.

No they don't. Port hits rev lim @ 5600, stbd.peaks out 5000 rpm, using the TU 5blade 29' props.

You can swap props on the bravo drives. When the sticks are forward you will be in reverse. So be carefull. If the same motor is low on RPM then you know it is not the props and something is wrong with the motor. If now the problem is the other motor you will know it is the props.

It's not the wheels,.. my 29 Q4's did the same thing to a lesser extent. I simply hit the rev limiter faster on the port side, since both props are now too small. Carder

Sounds more and more like the slower engine is down on power. Pull the plugs and do a compression and leak-down test. Could be something as little as a broken valve spring.

Once you done this & all checks out OK, then next place to look is ignition

thanks for the suggestions, I was also wondering if it could be a fuel delivery problem,.. pinched line, carb jets, fuel pump,
whatever. Carder

Might be fuel but you are saying problem is even down low. That does not sound like fuel to me. Most times if it is fuel it is in the upper rpms (4000+) But I have seen stranger things. It sounds to me like you are only running on 7 instead of 8

check plug wires,#5and #7, can be crossed and not very noticeable until under a load,also check your total advance1

contact the engine builder before you do something you shouldn't.

Thanks for the suggestions... 3 brand new plugs were fouled on stbd side. rechecked advance: 35 degrees as set.
checked carbs: both jetted as dynoed.
fuel volume was also equal on each engine.
fine tuned the throttle adjustments, put in new plugs and now it runs within 100 rpms of each other... who knows how accurate the gauges are.
Anywho...I am back terrorizing Saginaw Bay as of tomorrow.
Carder

Most tachometer manufacturers claim that their tachs are accurate + or - 150 rpms. A photo tach will tell you how you're doing.

I'd say three fouled spark plugs would definitely make that engine down on power. Did you find the cause of the fouling? Did you take a compression test?

NO. and now the alarms are going off as soon as it gets warmed up.. no pressure issues or heat issues on the gauges, the resevoirs are full enough. I cant boat due to the incessant alarm noise that is ongoing after the engines have been run for 15 minutes.

Are the alarms going off on BOTH engines?

yes. starts with slight chirping on the stbd, then the port follows momentarily. sometimes taking them out of gear and reving up will kill them for a moment. other times not. The gauge alarm lights are not going off, and the only gauge difference I have seen is oil temp at 230 when the port was 180. It happened briefly while water testing with Tyler; he figured low oil pressure alarm, so he removed both thermostats as I was leaving to keep the oil cooler/ thicker