1984 Mariner Dies when goes into gear.....

imported_jwilson · #1 July 28th, 2006, 12:20 AM

I have a Hydra Sports with a 1984 Mariner 90 HP 4cyl 2cyl. (I was told it was a 75HP, but i found a web site on here and looked up the vin and said its a 90hp????) Any way my question is It will start, idle and rev up fine, but when i put it in gear it will die. Once i get it going it runs strong. Whats up? The carbs where just serviced 1 month ago. It sat for 3 weeks. What fuel mix do you recogmend?
Thanks,

Sotestar · #2 July 28th, 2006, 04:08 AM

I suggest that you take a look at your carb idle adjustment or try adjust it while in neutral up about 100-200 rpms and see it that works... Also see if it replicates itself in reverse as well. Adjusting the carb correctly should be your first step and hopefully your last. Check your rpm's in neutral first and go from there.

imported_jwilson · #3 July 28th, 2006, 06:34 AM

Where should the rpms be in nutruel? And yes, when i put it in reverse it did the same. When it was cold, it didnt die as easy....Do you think i should keep the fuel mixture 50:1 or since its an older motor run a little leaner at 60-75:1?

andy6374 · #4 July 28th, 2006, 09:45 AM

NO, Keep at 50:1.

Has the motor always done this? You either running too lean (too much air) or you are overpropped.

Texasmark · #5 July 29th, 2006, 10:15 AM

My 90 hp is 675 rpm in the water, in F gear. This works out to just under 1000 rpm's in N.

Agree on 50:1

The correct setting for the low speed needles is 1 1/4 open from closed and then if that doesn't solve the problem another 1/4 inch then another. Since you just had your carbs serviced, I can't say that you have crudded up carbs which is what I was going to suggest next.

When you set your needles, very gently seat them then back off the required amount. If you seat them too tightly you will deform the needle and render them useless for engine control. When you feel them stop, you stop turning.

Mark