Rude XP 150

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I'm looking at a boat with a Rude XP 150 on back. Is there anything I need to look out for with this motor? Is it a relieable motor? Any drawbacks? thanks guys

[stratos284]

I had one and put a new power head on it, It was a good motor but it was heavy and looked like a refregerator on the back. You might want to look for a evinrude 150 intruder you wont be disapointed with that motor

[fishinscott]

I've got an '89 XP150 on my 19' Nitro. It's a pretty heavy boat, but the rude pushes it along at about 63 MPH. I'm the third owner, and I know the first 2 owners knew nothing (and did nothing) about maintenance. The crossflow is a very reliable motor, but it does require some routine maintenance.

I run Seafoam in the fuel and do an annual decarb, and replace the plugs right after. I think the seafoam does a great job, since I get very little carbon out when I decarb (the first time I decarbed it it looked like I just powerwashed my grill after grilling 100 burgers )!! I have the motor torn down right now, and there was virtually no carbon buildup on any of the pistons or heads.

The repair issues I've had to deal with are as follows:

Fuel Scavenging Valves: (1/8" brass check valves in the fuel system) plugged and needed to be replaced.
Carb Float Bowls: Plastic float bowls were warped and leaking fuel residue all over the outside of the motor. When I rebuilt the carbs, I sanded the float bowls flat...problem solved.
Powerpack: When I bought the boat, it had a serious miss at top end speeds. A new powerpack cured that.
Coils: I did have one coil go bad, and replaced them all to be safe. They're not too expensive.
Regulator: The regulator was not working when I bought the boat. They're over $200, but they are a fire hazard when not operational so I bit the bullet.
VRO2: Mine's got a VRO2 unit, and it's been problem free. I disassembled it and inspected the internal components just to be safe. Everything looked good!

It may look like a long list of items, but they were mostly just minor issues, and relatively inexpensive to resolve with the help of the good folks on this forum . So, whatever you do get an Evinrude, and with these guys you can't go wrong .

Oh yeah, if you're wondering why I've got the motor torn down right now, it's because the crankshaft broke. I don't think that is a common failure in these motors, and the ignition miss that I mentioned above was happening for almost a year before I bought the boat. The shockload of having a motor continually cutting out for a split second at WOT is certainly to blame for the eventual failure of the crankshaft.

I have had great success with this motor, and with the help of the mods and the other great folks on this forum I expect to have it up and running again soon.

Good luck with your motor, whatever you go with!

[Lockjaw]

They are pretty decent motors. Use good gas and oil. I don't think they have the beans that the 91 up 150's do though. There is about a 25 pound weight difference between the 2 engines. The flo being a little heavier, not much though.

I wouldn't be scared of it as long as it had good compression and powered the boat ok.

[Lockjaw]

Hey I have a new in the box metal bowl for those carbs too.

[DoferGofer]

What would you consider "good" compression for that engine?



Regards,

[fishinscott]

I'm getting between 86 PSIG and 90 PSIG on mine. The important thing is that they don't vary more than 10% between cylinders. If you've got one or more cylinders that have compression that measures a lot lower than the others, than you have a problem.

If you're concerned about the overall compression of the motor, a leakdown test will give you a much more accurate indication of the seal of the cylinders. That would probably need to be done by a qualified repair shop.

DISCLAIMER: MAKE SURE YOU PULL ALL THE SPARK PLUGS, GROUND THE IGNITION SYSTEM, AND WATCH THE HECK OUT FOR THAT FINGER EATING FLYWHEEL

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fishinscott &raquo;</TD></TR><TR><TD CLASS="quote">I'm getting between 86 PSIG and 90 PSIG on mine. The important thing is that they don't vary more than 10% between cylinders. If you've got one or more cylinders that have compression that measures a lot lower than the others, than you have a problem.

If you're concerned about the overall compression of the motor, a leakdown test will give you a much more accurate indication of the seal of the cylinders. That would probably need to be done by a qualified repair shop.

DISCLAIMER: MAKE SURE YOU PULL ALL THE SPARK PLUGS, GROUND THE IGNITION SYSTEM, AND WATCH THE HECK OUT FOR THAT FINGER EATING FLYWHEEL
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Hello Scott,

Your compression is the same as on my engine. Keep in touch on your engine refinish. I will be glad to help in any way.



Regards,

[fishinscott]

Thanks Melvin, I'll keep you posted on my progress. It will likely be a little slow, since I've got a pretty busy schedule these days, but I very much appreciate the help!

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fishinscott &raquo;</TD></TR><TR><TD CLASS="quote">I've got an '89 XP150 on my 19' Nitro. It's a pretty heavy boat, but the rude pushes it along at about 63 MPH.</TD></TR></TABLE>
Hello Scott,
Is that 63 MPH GPS or speedo also, what prop and rpm's your engine is turning?



Regards,

[fishinscott]

Howdy, Melvin.
I've got a Magellin Meridian (handheld) GPS that seems to be pretty accurate on the speeds (at least comparing it to the speedo on my truck). On a nice cool day with just me in the boat, it'll cruise at 63MPH. Throughout the summer, I'm usually seeing 60MPH on the GPS. The best speed is when I'm running my 24P Raker 3-blade, but I run the 22P Raker 3-blade when I'm going to be fishing with passengers, as the 24P is pretty sluggish on the hole-shot when she's loaded down. I've got a jack plate that I've got set about 1" below where she starts to cavitate at full trim. I moved it up about 4" from where it was when I bought the boat. That has improved the hole-shot tremendously.

I'm not usually running her WOT, cause I'm just not in that much of a hurry to get anywhere . I don't get wrapped up in the bigger-better-faster tweaks, I just want everything factory and reliable!! There's a guy in our bass club that's all about squeezing every MPH that he can get, and I don't think I could count on my fingers the number of times he's had his engine grenade for one reason or another !! I don't want to be for the motor to stay together!!

Have a great day

[Lockjaw]

63 Gps is pretty decent, all things considered. Mine runs similar, although I am like your buddy, but am doing my best to not do things that make it unreliable.

Rakers run well, you might try a 23p renegade and see if you like it. I like the gade much better then the rakers. Holeshot is definitely better, and you don't have to trim all the way down either.

[DoferGofer]

Scott & Lockjaw,

You guys are screaming at 63 mph. I am consider myself lucky to achieve 43-44 mph (gps) using a 14 1/2" X 19" SST factory prop. @ 5100 rpm's give a + - 50 rpm's depending on load and or running conditions.
Maybe, I should consider using a jackplate or at least move my engine up as far as it will raise. I have only one more hole to make this move. I have a 21" SST prop that gave me a couple more mph but lowered the rpm to the 48-4900 rpm range which I think is way to low for my engine.
Scott, I will be interested in the compression reading on your engine after your rebuild and if you see an increase in performance.



Best of regards to both of you.

Melvin

[fishinscott]

I'll be very interested in that as well. I had a guy look at my block and double check all of my measurements to make sure everything's good. He has been racing boats and repairing outboards for over 50 years, and tells me that by simply boring the intake and exhaust ports, he can turn my motor into a 175HP.

I'm inclined to just repair it as-is, and leave well enough alone . This repair business is fun and all, but I think I'd rather be fishin' than pulling her back apart!!!

Melvin, what kind of hull do you have? I'm not familiar with a Key West. Is it a flats boat or walk-around offshore boat? You probably have a pretty deep draft. I don't know what my boat drafts, but it's probably only 6" or so on plane.

I'll let you know how we do!!

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fishinscott &raquo;</TD></TR><TR><TD CLASS="quote">I'll be very interested in that as well. I had a guy look at my block and double check all of my measurements to make sure everything's good. He has been racing boats and repairing outboards for over 50 years, and tells me that by simply boring the intake and exhaust ports, he can turn my motor into a 175HP.
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Monty can up you to 200 HP and still give you a "SIX YEAR" warranty. Give em a call, tell em I sent ya.
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fishinscott &raquo;</TD></TR><TR><TD CLASS="quote">Melvin, what kind of hull do you have? I'm not familiar with a Key West. Is it a flats boat or walk-around offshore boat? You probably have a pretty deep draft. I don't know what my boat drafts, but it's probably only 6" or so on plane.
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My boat specs.
http://www.keywestboatsinc.com/boats/1900cc.html

Please keep in touch.



Regards,