Low on power, need assistance please.

[Sullivankyle7]

I had just bought a 1972 amg deuce and a half multi fuel and it seems to me that's it's low on power, I can't get it over 35 mph and everytime I tried using 5th gear it would lose speed and drop rpm to where I would have to down shift back to 4th and wined her up again would bad fuel filters cause this problem?

 

[Katahdin]

Are you certain the transfer case is in high gear?

 

[Sullivankyle7]

Yes it's in high she only revs out to like 2500

 

[m16ty]

A good start would be to change your fuel filters and make sure your air filter is clean.

Sounds like fuel filters to me.

 

[guns1977]

Fuel filter or fuel line, had black alge in my line from tank to prefilter got worse and worse. Cleaned it out and new filters and runnin a fuel conditioner for extra precaution. Been runnin like a champ ever since

 

[Flyingvan911]

Ditto on dirty fuel filters. Be sure to change them all at once.

 

[Sullivankyle7]

Ok I'll start there what's the best way to flush the fuel system? Or clean the tank? Sorry guys new to the deuce life

 

[porkysplace]

There is a drain on the bottom of the primary fuel filter that is suppose to be drained regularly ( most people don't) . Draining it will give you a idea of what kind of crap is in the filters.

 

[Sullivankyle7]

I hope that's my problem

 

[porkysplace]

You can pull the strainer out of the fuel tank and shine a flashlight in the tank to what it looks like .

 

[Sullivankyle7]

I did that and I can't see anything floating in it but the diesel looks like lemon lime Gatorade. I

 

[Sullivankyle7]

When I bought it he said it was fresh but idk

 

[gimpyrobb]

I did that and I can't see anything floating in it but the diesel looks like lemon lime Gatorade. I

Thats about right.

I have secondary filters if you decide you want some. PM for more info.

 

[chwhite0783]

When I got mine I had similar problem. changed all the fuel filters and good to go. undo petcocks on fuel filters to see if you have any water...could be a possibility also

 

[Katahdin]

Filter changes don't necessarily cure all your problems. Most "New-to-me Deuces" will probably have slime building up on the pump intake screen that obstructs the fuel flow.

Here's one I pulled today on a new-to-me m35A2.



I recommend new deuce owners clean out their tanks and pumps before you go too far with them, it might just save you a lot of trouble down the road.

 

[Sullivankyle7]

Where exactly is that in the tank?

 

[Katahdin]

Where exactly is that in the tank?

The fuel pump pulls out from the top, see pic.



Edit: forgot to add, M109 owners will need to remove the tank first from the truck because the van body box rides lower then a cargo bed. The pump can be removed from a M109 if the box floor has been cut out, I've done it that way too.

 

[Sullivankyle7]

Ahhh yes I see thank you

 

[Sullivankyle7]

Hey guys I need help again!!!! Ok now it runs good next problem I am having is my brakes..... They stick to the point were I can park on a steep driveway and not roll. But when there is no air in the tanks it rolls just fine to were I can **** near push it on flat ground. Any ideas thanks!

 

[jetman10]

speed is down

I took my deuce out for the first time any distance and the top speed was 40 MPH ! How high are you suppose to rev these things . I had it to the floor and it topped at 3000 RPM . Filters are good . It felt like I needed another gear above 5 th . I have it bobbed and 48 inch tires . My calculations showed a 7.5 mph increase over the stock tires and I was showing 33 mph with it floored . Made a long trip . My rear ratios are 6.72 . Should I change the gearing . I could stay in 5 th thru town !! Help !