I have a 1997 S 150 TXRV.
The problems are;
Boat will only pull 5000 RPM max with a 15P prop
When getting on throttle aggressivly from a stop boat has a surge around 3500 RPM. It is wierd, hammer the throttle and motor cuts out for a split second then goes.
The boat had a very faint lean sneeze idling back into dock. It has only done this twice.
The trouble shooting I have done so far is;
compression check yesterday. All numbers are 10% or better between cylinders, lowest is 125 PSI
Spark test, number 1 had weak spark.
Maint done to this point;
Replaced all spark plugs, all spark caps, replaced #1 coil due to weak spark. re-tested spark and it is where it should be.
Only trouble shooting not done is a vacume test (I don't have the tool) on the fuel system, which for this problem is probrobly the test I need to do the most.
So with out the correct equipment I am leaning towards a fuel related problem. But I did find the weak spark on #1. I wounder if I should water test the boat, then if I continue to have problems buy the vacume gauge and test the fuel system.
What would you guys do? I can't see spark causing the cut out when agressive on the throttle. Seems like the boat runs out of gas then catches up. Anything else I can check for this problem?
The problems are;
Boat will only pull 5000 RPM max with a 15P prop
When getting on throttle aggressivly from a stop boat has a surge around 3500 RPM. It is wierd, hammer the throttle and motor cuts out for a split second then goes.
The boat had a very faint lean sneeze idling back into dock. It has only done this twice.
The trouble shooting I have done so far is;
compression check yesterday. All numbers are 10% or better between cylinders, lowest is 125 PSI
Spark test, number 1 had weak spark.
Maint done to this point;
Replaced all spark plugs, all spark caps, replaced #1 coil due to weak spark. re-tested spark and it is where it should be.
Only trouble shooting not done is a vacume test (I don't have the tool) on the fuel system, which for this problem is probrobly the test I need to do the most.
So with out the correct equipment I am leaning towards a fuel related problem. But I did find the weak spark on #1. I wounder if I should water test the boat, then if I continue to have problems buy the vacume gauge and test the fuel system.
What would you guys do? I can't see spark causing the cut out when agressive on the throttle. Seems like the boat runs out of gas then catches up. Anything else I can check for this problem?
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