1974-76 150 I6 does it have no reverse ??

[RaScLeS]

**pics added** my 150 merc clearly goes into drive, but when i put the merc control in reverse it doesnt do anything (but ive yet to actually test this on the water and look at the prop.

does the merc, black tower of power, with a silver lower unit have reverse? ive read one setup that did not and that is just stupid because my lake has weeds.

also for any readers the motor has no electric choke hooked up so i have to start it without it, it should have this right ? I have no clue how to hook it up.

I may get a pic of the motor and LU so its easier to figure out

 

[Chris1956]

Re: 1974-76 150 I6 does it have no reverse ??

A '74-76 Merc Inline 6 should have both reverse and an electric choke solenoid.

Do you have the standard MerControl single handle, with a small cold start lever and a choke button?

Also, those motors were all black. No silver on the insode or outside.

A picture would help.

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

def. no reverse on this, it makes a slight grind noise and if i hit the gas theres nothing.

the setup is a mercontrol with the lift up handle removed, the electric choke button does nothing. to throttle up I push on the jack plate (foot throttle)

getting a pic now but the LU is under water

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

I have a slight, slight hunch the boat is rigged to a racing gear case that has no reverse like ive read. I still dont see how that could be beneficial at all but ........ so its windy and if i screw up docking im basically jumping out of the boat

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

just went for my first rip in this old speeder, started instantly and went smoothly into gear. i hit the plate and lift off was easy and i was on plane cruisen. I smashed on it and hit a nice high speed cruise after i let off.

my volt gauge showed a healthy 14.5 or so running at the dock but went past 16v on the water under load i dont like that much.

one more thing, as i was coming to dock the motor was speeding at the dock fast so i put it in neutral, the idle was really high like 1200 or so (my gauge isnt working) and i was drifting so i had to put it in gear with the thud. I hate doing that.

to adjust the idle down a bit I have to turn all the carb screws left 1/4 turn ? or ? because i seriously have no idea

lol oh, and i checked my fuel tank (the onboard tank has an issue so its a merc fuel tank) and it took almost a 1/4 of the fuel just from what ive done so far. WHAT A GASOHOLIC !!!!!!

 

[Chris1956]

Re: 1974-76 150 I6 does it have no reverse ??

I suspect the hotfoot throttle has caused some mods to the standard controls. Remove the wrap cowl and move the throttle handle to neutral and then reverse. You should see the lower cable move back to the middle of the motor for neutral and then move further aft for reverse. If you do not see this movement, the controls are wrong.

There is an idle stop screw above the distributor. That controls the idle speed, along with the throttle, which must push the throttle closed. Again, since you have the hotfoot, I cannot predict how it is adjusted or even rigged.

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

the foot plate only works off the merc control, extending the cable from the control to the footplate.

I need to figure out that idle issue, aswell as the reverse.

when i put it in reverse with the motor off I can see the lever go back like it should, then the foot plate controls the throttle

 

[sschefer]

Re: 1974-76 150 I6 does it have no reverse ??

Depending on the mods that have been made to that motor it may not have a reverse. The mention of the silver gearcase makes me think it's got a modified performance gearcase on it. I won't even hazard a guess as to which one (CLE/Sportmaster/Torquemaster) or just a stock lower with a Bobs nosecone and some silver paint. The real deal would be either glass beaded aluminum or semi polished. I'd like to see a pic of it if you have one.

It wasn't/isn't uncommon to find these motors setup for top end and if that's the case I might have a week bottom end that causes it to stall. That engine and the controls may have been setup for starting in gear.

I'm not an inline person by any means but I've read a lot and heard a lot of talk about different mods that are done to them. If it has the Wiseco pistons in it like the cowl sticker say's, somebody ponied up some bucks to try and make it go fast.

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

problem solved with the high idle, pull back on the plate all the way.

the boat is out tmrw, ill get a pic of the lower end and motor.

possible problem: I dont know for sure without a tach but, the boat could barely hit 45mph today on semi rough waters going with the current wot. I know for a fact its got more just the 115 is a monster and this is a 150 ! weak distributor ? plugs are fine fuel is fine carbs look real clean. im thinking the power trim needs set up better maybe tilt the motor up more up ? manually, till the trim is fixed? i want to hit about 60 since the 115 hits 50mph with an extra 800lbs in the boat and an almost full tank (exact boat)

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

also found a manual choke that IS hooked up. Ill try that tmrw and see if it barks up right away. ill check how the choke works on the 115 and see about the electric

 

[Chris1956]

Re: 1974-76 150 I6 does it have no reverse ??

I had that motor on a 16 foot Avenger for many years. It would hit the high 50s, but you need to have it set up properly. With this being a new boat to you, I would recommend you check the height of the motor, the kind and pitch of the prop, the gear ratio and the compression.

The distributor supplies the same spark to all cylinders, however, sometimes one or more plug wires will arc to ground. You need to check for this. Also, check spark plugs for color. Any that are real clean could indicate water intrusion.

 

[RaScLeS]

Re: 1974-76 150 I6 does it have no reverse ??

ill check, it was running sluggish on the way to the ramp, floored it would get up but not like yesterday. it was low on fuel but still its got some and wouldnt pass 20mph floored. probably the fuel but ill be looking into this motor some more and posting

i notice the carbs are all some what wet with gas or oil which is weird....im throwing in a new set of plugs for sure. ill fill her up soon and give it a run.....very heavy on fuel this motor anyone got a solution for that

thanks