No power 33ski twin in gear

[mds]

First off the motor is an Evinrude 33hp MODEL # 33653 which I believe is a 1966. I have cleaned the carbs float adjusted strait flat when upside down, new plugs J4J(.030). The motor had been sitting for about 4 yrs when I pulled it out and after cleaning it up a bit including carb and plugs at which time I also check compression and was approx. 95-100 in both cylinder's. The motor will start with just a tap of the choke when starting cold and after warm will start just as fast without the choke and raps out nicely. The problem I am facing is once you place it into gear it dogs down and will only go maybe 5 mph. This is on a small 14' boat that had a 40hp evinrude that had been locked up and it would run this boat approx. 25-30mph when it ran. I run 50/1 fuel mixture as that is what I have always ran on older motors like this one. There are two things that come to mind and the first is fuel pump has been replaced with a electric one(I have now the parts to switch it back if this is the cause)and has a clear in-line fuel filter in which you can see is always full of fuel and wonder if it places to much pressure but it doesn't seem to flood or foul plugs so I don't think it is blowing past the needle valve on the float. The second is the high level fuel/air needle as it seems very touchy when adjusting it. What I can't get is it raps out real good and tight, quick response and everything until I put a load on it then then I mine as well have a trolling motor mounted on there. Any ideas or suggestions would be great. Thanks<br /><br />Also another thing I was wondering about was the cam ajustment how it should be set. The book I purchased which is an Outboard Marinr Corp. repair manual believe it or not doesn't really show how to ajust or really very clearly it should be as to marks.

 

[ppjmb5]

Re: No power 33ski twin in gear

sound famiular to what i had go wrong <br />you got compresiion and the carbs were cleaned <br />does it run great at idle? if so its the fuelpump<br />ill bet money on it i have a 85hp v4 that would only do 12 mph had good comp.carbs rebuilt i was frustrated re built the fuel pump and wham she flies now read my postings for more info

 

[mds]

Re: No power 33ski twin in gear

right now it is using an electric fuel pump so I wouldn't think the diaphram could be causing this. I may slap the diaphram pump back on and see what it does in the morning. It does go through about 3gals of gas in aprox 3-4 hr trying to get it to open up though.

 

[ppjmb5]

Re: No power 33ski twin in gear

you will burn more gas if it doesnt plan out thats normal did you rebuild the carbs? with a kit i dont know what the comp should be for that motor so i couldnt tell you if 90 or 100 is good or not i would say it has to be a fuel problem not getting enough fuel<br />start from the the tank to the primer ball(sometimes they go out) to the fuel pump

 

[mds]

Re: No power 33ski twin in gear

carbs rebuild using a kit and are not flooding out. As for the primer, right now it doesn't have one due to the electric fuel pump and the fuel filter never runs dry or even half way at full RPM's when not in gear. I will be putting the bulb and mechanical pump back on and see what that brings. BTW the reason for the electric pump was I had both of the twin motors at one time on another boat and they both ran real good except they would run the bulb dry so I switched it over to an electric pump going directly to both engines and never had a problem with it back then.

 

[papasage]

Re: No power 33ski twin in gear

try spraying gass into carb while full throdle see if that helps .open high speed setting . pull plug wires one at a time see if that makes a difference .[ use insulated pliers ].

 

[mds]

Re: No power 33ski twin in gear

Well I'm not going to make it to the lake today to work on the boat as I is at the cabin there. We are having a day of thunder storms rolling through. I may go down later today and get it and bring it home and try as you suggested by spying gas in while running wide open, and also pull one plug at a time to see if one cylinder is dropping out. My question is since it is running good without a load on it do you think it will do much by spraying gas in without a load on the motor? I have a 55gal drum I can fill with water and try it in but it washes the water out fast with the prop turning and so on. I have a set of water muffs but it wouldn't be putting a load on the motor.

 

[Chinewalker]

Re: No power 33ski twin in gear

Hi MDS,<br /> Do you have spark on both cylinders? Spark in the open air doesn't mean anything - it's spark under compression that counts. Try pulling one wire at a time off the motor and note any difference in performance. If there's no difference, the motor wasn't running on that cylinder. If it immediately cuts out, then it was running on that one. Use plastic pliers or an insulated glove if you're handling wires on a running motor...<br />- Scott

 

[papasage]

Re: No power 33ski twin in gear

dont run wot in a drum just a fast idle will do . if one carb isent producing it will pick up sped . a ob. with 2 cylinders will idle smooth on 1 cylinder . i will also rev . but under load it willnot pull .papasage

 

[mds]

Re: No power 33ski twin in gear

I'm going to the cabin to bring the boat home here in a few min. so I can play with it and hopefully get it going strong and put it in the lake tomorrow. BTW I picked up a new set of plugs and a new pump kit. and I will try pulling plug wires one at a time. I have rebuilt many truck and car motors over the years but this is the first boat motor I have had problems with. I miss my tri-haul with 85hp evinrude that never let me down.

 

[mds]

Re: No power 33ski twin in gear

I think I narrowed it down to something in the coils or points. I could pull off the top wire and it ran about the same not a whole lot of change, but after placing the wire back on and firing it up again I removed the bottom wire and the same thing. It seams the for some reason with either wire off it runs the same as when both are on. I'm going to pull the flywheel off in the morning and take a look. Also I noticed the cam roller has a groove worn in it and I will try to get that replaced also. What get's me is I can put a spark tester on either wire and they both seem to fire but I can pull either one off and the engine responds the same.

 

[Bass Runner]

Re: No power 33ski twin in gear

Here's just a thought, I have a 1968 33hp and it says right on the access door on the front, (FUEL MIX 25:1) they were smokie old motors but hard to kill, look at the coils sounds like one is breaking down or points are stuck.

 

[mds]

Re: No power 33ski twin in gear

Well mine says inside the door 50:1 but I got it going strong now There is a switch under the flywheel the has a wire the goes to a vacuum valve the in turn goes to the coil for the bottom cylinder and the switch was stuck in the open position causing the bottom coil to work on and off. I took apart the switch and cleaned it then put it back together and tuned it up a bit. I then took it to the lake and ran it for a few hours and it tops out at about 24mph in the smooth side of the lake and around 20mph going across some white caps on the old 14' boat.

 

[papasage]

Re: No power 33ski twin in gear

i have run 50:1 in my 33 hp 1966 for years