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Gas in oil

H

hagarty

New member
"I have a suzuki dt 70 4 strok

"I have a suzuki dt 70 4 stroke my oil level keeps rising it smells like gas need help,any body have this problem,I replace the fuel pump thanks ray"
 
this is a common problem on ne

this is a common problem on newer engines. if fuel pump is alright check running temp and propping.
 
"yes the o-ring was replaced,t

"yes the o-ring was replaced,took the old fuel pump apart and could see no hole in the diapharm"
 
"will check temp and prop in t

"will check temp and prop in the spring, the prop looks large my motor is a 1999 dt70 4 stroke what size should the prop be"
 
"if your eng. isn't proped

"if your eng. isn't proped right , lugging the eng. (not acheaving recomended RPM) at wide open can cause fuel blowby into the crankcase"
 
"still have oil in the gas cou

"still have oil in the gas could low compression cause this ,all four clylinders about 145 to 150 lbs ,what should my compression be. my prop size is 14 ihch by 11 pitch, RPM seem OK 5500, how do I check the temp what should it be"
 
"sorry about the DT and DF mix

"sorry about the DT and DF mix up I have a DF70THLX
I have gas in my oil,I can run the motor about 3 or 4 hours and gain about a 1/2 inch on the dip stick, the oil smells like gas"
 
"Aloha from Hawaii. I am havi

"Aloha from Hawaii. I am having the exact same problem with my twin DF70 outboards. One is a 1999 model with 800 hrs, and the other is a 2001 with 700 hrs. Both motors start up and run flawlessly. Props are sized right. I troll at about 7 to 8 knots, but often go faster or slower. Sometimes, I stay at idle or very slow speeds for extended periods (baiting for fish, or swim escorts, etc.)

My mechanic friend suggested replacing my diaphrams on my low pressure fuel pumps. I did that, as well as the the "O" rings, but problem persists. He then said that if the needle valve and/or seat is worn, it may cause the high pressure fuel pump to lose pressure,causing gas to run when the motors are shut off. He suggested rigging up a pressure gauge to check the pressure to verify if this is the problem. This is a little too much for me. Does anywone know of others ways to find the problem, other than opening up my wallet at the local dealer.

Thanks.

Claude Moreau"
 
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