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  13' Whaler with engine problems Help!!

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Author Topic:   13' Whaler with engine problems Help!!
The Mexican posted 08-12-2004 04:56 PM ET (US)   Profile for The Mexican   Send Email to The Mexican  
I have a 13' whaler I believe to be a 1971 with a 1982 evinrude 35 hp electric start. I was out on the lake the other day with the kids pulling them on a tube when the engine starting running rough. Told the kids lets pack it up before we have problems and end up the crick without a paddle. When I lowered the engine to idle it really became rough so I shut it down. Felt the head to see if it was hot maybe a bad pump or something to no avail it was somewhat cool. I started it up and it cranked right over still acting real rough. I put it into gear and gave it gas and it died. So I tried it again and it wanted to die so I gave it full throttle and it started just chugging along at about 2 knots. When I played around with the throttle I maybe got it up to 3 to 4 knots. Managed to get back to the ramp and loaded up. I tried to run it later and it would not start. I sprayed a little engine start into it and I could get it to run on the fuel from the engine start then die. I thought it might be a broken fuel line or bad fuel pump. Replaced the fuel pump after verifying good compression, 150# both cylinders. Checked real good spark. Cleaned out carb and I still cannot get unit to run. The fuel pump pulses a small amount of fuel. How much fuel should it pulse and could I have bad reed valve with this kind of compression? The kids sure would like to get the boat back on the water so any help would be appreciated. Thanks Marcos in CT
larpad posted 08-13-2004 10:41 AM ET (US)     Profile for larpad  Send Email to larpad     
When you pull tubes, with slower speeds and higher RPM's, the spark plugs can foul. My 13 with a 35HP did the same thing and a plug cleaning helped tremendously.
larpad posted 08-13-2004 10:42 AM ET (US)     Profile for larpad  Send Email to larpad     
When you pull tubes, with slower speeds and higher RPM's, the spark plugs can foul. My 13 with a 35HP did the same thing and a plug cleaning helped tremendously.
nFL_Bosn69 posted 08-13-2004 10:43 AM ET (US)     Profile for nFL_Bosn69  Send Email to nFL_Bosn69     
This may be way off, but have you checked your fuel line from the tank to the motor for leaks. I bought a brand new fuel line from the Johnson dealer about three months ago and it leaked the day I bought it. Which caused me no small amount a grief on the lake.

Ryan

nFL_Bosn69 posted 08-13-2004 10:44 AM ET (US)     Profile for nFL_Bosn69  Send Email to nFL_Bosn69     
The above may be a better solution.
lloyd13 posted 08-13-2004 01:01 PM ET (US)     Profile for lloyd13  Send Email to lloyd13     
Sounds a little like bad fuel, or water in the fuel. That would help explain why it runs on ether but not on gas. Especially with spark and compression.
The Mexican posted 08-13-2004 06:29 PM ET (US)     Profile for The Mexican  Send Email to The Mexican     
I have checked the fuel line and verified no leakage. I have removed the plugs and given them a good cleaning. I just put them in this year. The gas could be the culprit so will change this out tommorrow first thing. Thanks for all the help I will post my results later. Thanks Again. Marcos
packerbacker posted 08-17-2004 04:12 PM ET (US)     Profile for packerbacker  Send Email to packerbacker     
Had a similar problem with my Dad's boat a long time ago. Ended up being the tiny O rings on the gas line where it plugged into the motor. Guess it was sucking air. Ended up being a real cheap fix. Hope yours is as easy. Good luck
PeteB88 posted 08-26-2004 01:52 PM ET (US)     Profile for PeteB88  Send Email to PeteB88     
My cousin straightened me out on the subject of rough running older motors. Use good gas- something higher than 87 octane, new plugs every season, and use Sea Foam (brand) additive - just a few ounces per fill. I swear it smoothed out my motor amazingly well. You might need a tune up - new points and perhaps a new fuel pump. Why not? preventive = good sense.
Bigshot posted 08-26-2004 02:19 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
If she runs on ether(not a good idea being she needs pre-mix) then it is fuel related. Get a squirt sprayer and fill with 50:1 and spray right into the carb and see if she will fire. If she does then start tracing fuel lines, etc. If you squeeze the ball and hear fuel going into the carb then it is your carb. If no fuel can be heard, then find out why. Drain bow, on carb and see what comes out. My 6 gal tank was leaking rain water into it once and being the fuel line feeds from the bottom it filled the carb with water. That then corroded the main jet and she would not run, nor receive fuel from the carb, easy fix. Try the squeeze bottle and leave ether(starting fluid) to 4 strokes.

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