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91 mariner issues

  • Thread starter anthony ryan kindler
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A

anthony ryan kindler

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i ahve a 91 mariner and w

i ahve a 91 mariner and when i go past halr throttel the rpms go up but the boat does not pick up speed at all and it cuts out from time to time
 
"Anthony, sounds like you have

"Anthony, sounds like you have more than one problem there. The increase in rpm's without any forward movement is most likely a spun prop hub.
The rubber has probably worn between the hub and the prop itself and is slipping at higher rpms - time for a re-hub or a new prop.

The cutting out could be either an ignition problem or a fuel issue. Grab your manual (or get one first) and troubleshoot the ignition system. You need to determine if you are losing spark when it cuts out, or if your fuel supply is getting blocked...."
 
is your gear shift cable poorl

is your gear shift cable poorly adjusted? is it neutralising the gearbox when under heavy load? check the cable and adjustments for the forwards gear selection. i'd also be checking your shift control box up the front could be a problem there also. As far as the electrical problem is it only cuttingout when the engine rpms go up and it does not pick up speed or is it an constant problem even at low speed and rpms?
 
Once a MERCURY is in forward t

Once a MERCURY is in forward the design of the clutch and forward gear are such that they lock with the load applied.Look for electrial problems using a timing light as an old time scope.
 
"Have a Mercury 35 outboard &#

"Have a Mercury 35 outboard (serial A951897 and circa 1986). The issue is trying to remove the lower unit to change out the water pump. I got the SELOC manual that said to remove the shift lever coupler in addition to the normal lower unit bolts. I was able to drive out the shift coupler pin (and cut it off) to free the shift shaft but the lower unit is still stuck. Right now I have the whole motor turned upside down with penetrating oil hopefully soaking the drive shaft coupling (found an access hole through to the drive shaft through one of the bolts for the shock absorber gizzmos). I think the drive shaft is frozen to the coupling. I have tried wooden wedges, and beating on the cavatation plate with a wooden block but still no luck. Andy's picture and email on the drive shaft coupler was helpful. Ideas/thoughts would be greatly appreciated. I am very stubborn and determined to do this myself. Thanks Tony"
 
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