Rickter FR2 Maniac Motor Electrical/Tuning Nightmare...

Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
Hey guys so I did a full bottom/top end rebuild on my Blue/Maniac Built 701 62T/61X motor 3 weeks ago due to a cooling line popping off and I nuked the motor long story short. I also managed to sink the ski at the same time so I just decided to do a full rebuild.

Irregardless I completed the full rebuild, it is now bored out to a 735cc, leak down test is fine held 10psi for a day, had an air leak at first on manifold side but diagnosed and fixed eventually. Ripped my dual 38's apart while rebuilding motor and cleaned everything, also added an MSD enhancer to the ebox while everything was apart.

Finally after everything was done and air leak issue was fixed I cranked the motor, idled great, low, mid, and high end sounded fantastic on the trailer! Put it in the water and rode on basic flat water back and forth for 5ish minutes powerband was great. Here's where it got weird... literally as soon as I tried to do anything other than normal flatwater riding, aka I did a tail stand, the ski instantly ran like total crap, bottom end went out the window completely. Midrange was pretty bad, high end was ok.

One of my buddies was telling me I might have a bad ground on my battery due to it's age, I checked spark on both plugs and it looked fine. Replaced battery and got a new ground cable. Went to water test again and as soon as I stood the ski up or put the motor at any unusual angle it completely bogged out on me... I've been troubleshooting this for 2 weeks now and it's driving me insane... If anyone could please provide any suggestions it would be greatly appreciated!!!

Again before I blew the motor and rebuilt it ran perfectly and the powerband was fantastic, recently rebuilt carbs. Only thing that was changed during the rebuild was the addition of the enhancer.
 
DAG

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
After pulling out of a tail stands and the ski running like crap how soon does it return to normal?


Likely: Assuming you entering your tail stands from jumping a wave and landing pump first? You probably had something move around on you, motor shifted back smashing into your coupler getting the drive train out of alignment? Maybe pulled a wire or loosened one from the shift?


Unlikely: You could have cavitation in the pump from the rear exhaust allowing exhaust gases to bubble up into the pump but the ski should ride good once on plane. If you are dead set on tail stands a front exhaust allows the motor to rev up quickly and get you back on plane.
 
Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
After doing a tail stand or anything that causes the motor to not sit flat and upright the ski never rums normally again. I can work the throttle and clear it out some but the bottom end continues to bog terribly. I don't know why I wouldn't be getting fuel all of the sudden.
 
Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
Also when trying to tune last week I noticed that after turning the low speed screw out almost 2.5 turns and the high speed stayed at 1.5 it would run slightly better with a little less bog. But 2.5 turns on the low screw is alot? All this because I bored from a 701 to 735? It would still bog on tail stands or anything else I think it's crazy to take it out farther than 2.5 turns on the low shouldn't be necessary
 
DAG

DAG

Yes, my balls tickled from that landing
Location
Charlotte, NC
Defiantly sounds like a fuel issue. And not a lack of fuel but to much fuel. Can you do it have have a friend tow you into shore and look at the plugs without restarting it or driving it to shore. They are probable soaked.

Pull the carbs back off and check popoff with a guage. Check the little round clear plastic check valves arnt on backwards or have a crease in them. Even a tiny crease will flood the engine. also check that the long exhaust hose is not shifting and blocking the tiny holes on the diaphragm plate. Check the internal fuel filter for blockage (unlikely). Are these the same carbs that sat in salt for a few days? Perhaps the micro internal circus are blocked? If a friend has some known working carbs just swap them over and should at least confirm one of the many carb related issues that could be going on.

take the current gas out, maybe water in the tank, lots of things to try ;-D
 
Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
DAG said:
Defiantly sounds like a fuel issue. And not a lack of fuel but to much fuel. Can you do it have have a friend tow you into shore and look at the plugs without restarting it or driving it to shore. They are probable soaked.

Pull the carbs back off and check popoff with a guage. Check the little round clear plastic check valves arnt on backwards or have a crease in them. Even a tiny crease will flood the engine. also check that the long exhaust hose is not shifting and blocking the tiny holes on the diaphragm plate. Check the internal fuel filter for blockage (unlikely). Are these the same carbs that sat in salt for a few days? Perhaps the micro internal circus are blocked? If a friend has some known working carbs just swap them over and should at least confirm one of the many carb related issues that could be going on.

take the current gas out, maybe water in the tank, lots of things to try ;-D
Click to expand...

Yes these are the carbs that were sunk. But I took every piece of them completely apart and cleaned them after I sunk the ski and then again after I ran it for the first time. I tried turning in the low speed screw to only a half turn out thinking it was too much fuel and it ran even worse. I looked at the plugs several times the tips were golden brown and the rest was pretty black.

I replaced fuel filter with brand new one, old one was full of crystallized salt from when the ski sank. My tank might be full of poop gonna pull the pickups tonight. I don't know what a mico internal cirus is. I cleared every pathway there was through both carbs.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
McDog said:
Check it for a loose baffle that is moving around and blocking exhaust flow in certain positions.
Click to expand...
ding ding........ loose baffle will let the ski run when flat, then when you change the attitude of the hull, the broken baffle will shift, get wedged do the the pressure pressing against it blocking the flow. Nothing you can do will make it unblock until you turn the ski off, odds are, you are going to pull it on a stand or trailer, at that point, it will shift again and free up, you go ride and it seams fine for a minute.
 
Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
Welll, only thing is in my previous post when I opened up the low speed screws a crazy amount of turns (2.5-3) turns I could do tail stands, etc with better low end, not fantastic but the ski wouldn't completely fall on it's face. Also when I did manage to get the ski up on plane at higher speeds for several minutes it would randomly instantly shut off making me almost go over the handlepole.

I will check the waterbox regardless.
 
Gunner_626

Gunner_626

Carolina Beach Freeride
Location
Wilmington N.C.
So after finding that my low and high speed jets were clogged once again I cleaned them again and now I have it tuned almost perfect. Only issue I'm having now is after high rpm jumps or multiple high rpm pulls on the throttle the ski will shut off on me but then crank back instantly with the push of a button.
 
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