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  1. pvanv

    Better to Lug or Rev a Nissan 9.8

    One for Elvin: Last season, I installed a new Nissan 9.8 on my 8,000-pound, 28-foot sailboat, rigged with the 5" pitch x 8.75" diameter, 4-blade HT prop. The factory tach showed max RPM's in excess of 6,000, maybe up to 6,200 -- just below the rev limiter point. The correct WOT range for the...
  2. pvanv

    Proper Propping of Sailboat Outboards

    Last season, I installed a new Nissan 9.8 on my 8,000-pound, 28-foot sailboat. A 15 would have been better for the load, but would not physically fit in the boat. I also installed the 5" pitch x 8.75" diameter, 4-blade HT Solas/Tohatsu prop. I was turning max RPM's in excess of 6,000, maybe up...
  3. pvanv

    High Thrust Prop Update

    Last season, I installed a new Nissan 9.8 on my 8,000-pound, 28-foot sailboat. I also installed the 5" pitch x 8.75" diameter, 4-blade HT Solas/Tohatsu prop. The tachometer showed that I was turning max RPM's in excess of 6,000, maybe up to 6,200 -- just below the rev limiter point. The correct...
  4. pvanv

    Zebra Mussels in Pickup

    Just a note for the freshwater guys here... Was preparing for spring launch last week, and happened to notice an odd appearance to the plastic inlet screen/strainer on my 1-year-old Nissan 9.8. Looked sort of like a poorly cast plastic strainer. Didn't notice that when the motor went in last...
  5. pvanv

    Reverse Thrust

    I posted to the Prop and Merc forums, but got no replies. Maybe the Non-Repair experts have an idea... I'm going through a 1981 Merc 7.5 OB, s/n 5848475, 8-tooth prop spline. The motor is used as the aux on a 23', heavy sailboat. The current prop is marked 7P A1 (I believe that means a 7"...
  6. pvanv

    HT Prop for Merc 7.5

    I posted to the Prop forum, but got no replies. Maybe the Merc experts have an idea... I'm going through this 7.5 OB, s/n 5848475, stencilled "COMET" on the side of the block, to get ready for spring. I believe this is a 1981 model year. It has the 8-tooth-splined prop shaft... The motor is...
  7. pvanv

    High Thrust Prop for 81 Merc 7.5 OB?

    Im going through this 7.5 OB, s/n 5848475, stencilled "COMET" on the side of the block, to get ready for spring. I believe this is a 1981 model year. The motor is used as the aux on a 23', heavy sailboat. The current prop is marked 7P A1 (I believe that means a 7" pitch) and visually, is a...
  8. pvanv

    VHF with Speaker in the Mic

    I'm looking for an onboard (not handheld) VHF that has the speaker in the mic. Reason is the radio will be below, and while I can clip the mic up by the helm, it's hard to hear the speaker. Do I have to go to something like a RAM mic, or is there a unit that is already configured like this?
  9. pvanv

    Register Dinghy

    For a boat tender, is it still possible to put the mother vessel's state numbers on the dinghy, followed by a suffix (I think it used to be you added a T to the end)? eg: NY 7251 BX T Someone suggested that the proper way now is to add a suffix numeral 1 No sure...
  10. pvanv

    BEST plug for 1981 Merc 7.5

    Im going through this OB, s/n 5848475, to get ready for spring. I believe this is a 1981 model year, based on the serial number, according to a few websites. The plugs presently installed are Champion L77JC4's. The plugs look like they may have been running a little on the hot side. Not bad...
  11. pvanv

    Prep Before Barrier Coat

    I have stripped the 40-year-old , flaking bottom paint from our 28' sailboat, and will be applying Interlux 3000E and 2000E barrier coat before painting with a good ablative bottom paint. This is not a blister repair -- there aren't any blisters, and the boat lives in Lake Ontario fresh water...
  12. pvanv

    High Thrust Prop for Merc 7.5?

    I have had a lot of good results using the Solas 4-blade Elephant Ear props on small outboards for a sail auxiliary. They actually give reverse thrust! But it seems they are only available for the Nissan/Tohatsu 4/5/6 and 8/9.8. I would like to get one for a Merc 7.5, but I don't see one...
  13. pvanv

    Impeller for Chrysler 3.6

    The West Bend air-cooled 3.5 was also sold as a Chrysler in the mid-70's. The Chrysler 3.6 has a water pump that just pushes water up a tube, and dumps it against the lower bearing of the powerhead. But I am having problems finding an impeller. Mine is getting pretty bad. Can I run without the...
  14. pvanv

    Sputtering Chrysler 3.6 Air Cooled

    I bought my 3.6 air cooled new in the mid 70's. This is the West Bend unit, with water pump for the lower bearing. Has had regular maintenance. Occasionally seems to lean out. The tillotson carb is very clean and yet seems to have an issue. Can run it in the test tank for an hour no problem But...
  15. pvanv

    High-Thrust Prop?

    This may be a little off-topic, but here goes: I am using a Nissan NSF 9.8 A3 long electric remote on a 7,000-pound sailboat. It replaces an old, tired, points-and-condenser 2-stroke Evinrude 15. I bought the rather radical-looking High-Thrust 4-blade 5-pitch prop that Tohatsu sells for this...
  16. pvanv

    High Thrust Pitch for Sail

    This may be a little unusual, but here goes: I am using a Nissan NSF 9.8 A3 long electric remote on a 7,000-pound sailboat. It replaces an old, tired, points-and-condenser 2-stroke Evinrude 15. I bought the rather radical-looking High-Thrust 4-blade 5-pitch prop that Tohatsu sells for this...
  17. pvanv

    Nissan 9.8 High Thrust Prop

    This may be a little off-topic, but here goes: I am using a Nissan NSF 9.8 A3 long electric remote on a 7,000-pound sailboat. It replaces an old, tired, points-and-condenser 2-stroke Evinrude 15. I bought the rather radical-looking High-Thrust 4-blade 5-pitch prop that Tohatsu sells for this...
  18. pvanv

    Nissan 8 Water in Oil

    I have a 2007 Nissan 8 hp 4-stroke (NSF 8 A3, serial ending in XG) that came in to our shop in August because it didn't start. Customer said it "made a grinding noise". This is an electric start tiller model. Customer claimed less than 3 hours new, and just trolling. I found that it had liquid...
  19. pvanv

    OB size for 28' 8,000 pound sailboat

    I have an 8,000-pound sailboat that uses a small outboard for aux power, and I need to replace the motor. This is a long shaft, remote control, electric start setup, in a lazarette well. Originally, this was an anemic 9.5hp 2-stroke. Everyone has replaced them with bigger motors. We now have an...
  20. pvanv

    Sizing Outboard for Sailboat

    I have an 8,000-pound sailboat that uses a small outboard for aux power, and I need to replace the motor. This is a long shaft, remote control, electric start setup, in a lazarette well. Originally, this was an anemic 9.5hp 2-stroke. Everyone has replaced them with bigger motors. We now have an...
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