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Discussion Starter · #1 ·
I was have a problem starting up. After the start up and run for awhile there is no problem. The first start up is hard, wants it warms up no problem. I can run from the murice to pintop with out a problem smooth, no miss and runs top notch. I can stop fish for a bit if I stay for a long time it is hard to start up. You have to chock the piss out of it to get it started. If you only sit there for a little bit there is no problem. Is it carbs,timing,fuel pump, I changed the fuel line from tank to filter and back to motor plus the primer ball. NEED HELP!!!!!
 

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Might be a clogged fuel filter, have you changed them? If it was a timing issues you would always have the problem, it is most likely a fuel problem.

bring some starting fluid to help get the motor started
 

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What year is it? I know some people recommend it and some dont, but my Johnson and Evinrudes have always run better on premix rather than depending on the VRO pump to mix the oil. I had a 150 and a 40 that were hell to start from cold. My 40 now that I premix starts on almost the first crank. Might be just the nature of the beast too. As tight lipped said, likely a fuel issue though.
 

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I'm guessing that motor has a fuel enrichment solenoid for cold starts, not an actual choke. Could be it's not functioning properly. Look around on your motor and see if there isn't a solenoid with fuel lines to it. If so, when you activate the cold start or choke, your should hear it click to put more fuel to the motor.

+
 

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Discussion Starter · #5 ·
It is a 89 but the power head was new in 2004 and not used until spring of 2008. Yes there is a soleniod I can here it engage. I put a after market fuel filter on it and yes I changed it last year. It seems like when it sits for awhile the fuel runs out of it does that make sence to you guys. Where do you start at with the fuel, is thier some kind of test to do? Like pressure in the fuel line or pump? If I stop using the vro pump do I disconnect it and undo the oil lines? Where should start ?
 

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Just because you can hear the primer working doesn't mean it is... You need to pull the carb air horn face plate. Then look down the carb throats while someone pushes in on the key. You should see fuel squirting.
 

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Joe

Could it also be his starting sequence for that motor? I was told you need to energize the fuel enrichment button for 8-10 seconds prior to starting.....is this true? If it is indeed his oil/fuel pump can the later model OMS pumps be repaired or is it better to swap the whole thing? I ask because I have a similar problem.

Michael
 

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Every engine has its own way it likes to start. Some engines like to be choked before you start cranking and others will start better when you choke it after it starts cranking. They should not be hard to start. You want to install a new OMS pump rather then rebuild.
 

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I thought that I had a problem with my Evinrude 70 until I learned that for when it first starts it won't even kick if you give it any throttle at all. Play with it first and just try different things as barnaclebill suggested.
 

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What`s the difference between an OMS and a VRO pump ?
Nothing, as far as I know. OMC was getting a bad rap for the VRO pumps where they were blamed for alot of breakdowns which were not necessarily the fault of the VRO's. OMC changed the name to Oil Metering System ....I believe in 1993? There have been some changes over the years to the VRO since 1984/85 but basically it's the same system. Someone may know better but I think this was strictly a PR move.
 

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Nothing, as far as I know. OMC was getting a bad rap for the VRO pumps where they were blamed for alot of breakdowns which were not necessarily the fault of the VRO's. OMC changed the name to Oil Metering System ....I believe in 1993? There have been some changes over the years to the VRO since 1984/85 but basically it's the same system. Someone may know better but I think this was strictly a PR move.
It was 96 and the OMS is a much better pump with more reliable alarms. The updated VRO for the older engines have lots better alarms.
 

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so need to say I am looking at $250 to $300 for this pump.
Probably in the 350 range, but I'm not convinced its your problem. ave you tested you primer yet? Also you want to go over all the fuel lines on that engine. God only knows what this moonshine is doing to hoses on a 20yr old horse.

They do make a gasoline only version that's a little cheaper. Then you mix oil in the fuel tank.

When you look over the fuel oses on the engine make sure you check the drive hose from the
vro to the Pulse Limiter valve on the intake manifold.. The pulse limiter valve should have been updated. If it's black it needs the new blue one. 20 bucks..
 
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