1998 200HP(EFI) Mariner help needed

riverrat41

Recruit
Joined
Jun 12, 2009
Messages
4
I have a 1998 Mariner that has trouble getting out of the hole.If you ease into the throttle to get up on plane it just boggs down.If you move the throttle quickly to full throttle it will take off(most of the time).Smokes alot as well like it is injecting too much oil....Thanks for your help!
 

j_martin

Admiral
Joined
Sep 22, 2006
Messages
7,474
Re: 1998 200HP(EFI) Mariner help needed

I have a 1998 Mariner that has trouble getting out of the hole.If you ease into the throttle to get up on plane it just boggs down.If you move the throttle quickly to full throttle it will take off(most of the time).Smokes alot as well like it is injecting too much oil....Thanks for your help!

Start with the basics. Check compression. If that's good, do a link n sync.

Even if the oil is rich it won't smoke too much if it's firing all the time. Excess Smoke usually indicates a miss.

That is a big 2 cycle, so you have to expect some smoke at idle.

hope it helps
John
 

Faztbullet

Supreme Mariner
Joined
Mar 2, 2008
Messages
15,589
Re: 1998 200HP(EFI) Mariner help needed

Check compression as John suggested and check spark also. Here are some things to check that will cause smoking and bogging on that engine.
This engine does not have a bleed system like a carb engine. The EFI bleed system sends all the unburnt fuel back to VST tank to be recycled. This is controled by a shut off valve and filter. If the filter is stopped up it will cause engine to load up and hesitate.Also a bad engine temp sensor will make it run rich as ECU sees engine as cold. A overpressurized oil tank will also make engine run rich as it forces oil thru check valve into VST tank. A TPI will make it run rich but more toward top end than idle. A sticking fuel pressure regulator will cause problems as pressure will not be within spec's.
 
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