Happy New Year too, although i see in Sydney they say its now only 2018.
Id add an impeller to the list if no ones told you to do that yet, check the gear oil and then you a pretty much set for years of boating. I havent touched my motor since i rejoined the crank case halves years ago and shes a 1982. I just flush well after use and spray crc over her to stop any surface corrosion spreading into the electrics etc etc.
Mines rope and pulleys too, 60hp. I did the powerhead on my mates 1983 90hp about 5 years ago. She had worse cylinder gouges than yours and shes going strong.
50/1 and keep the fuel nice and clean so no blocking of one carb and she should go for donkey years. I think my mate put an inline two stroke filter in his fuel line. Mine being only two cylinder id notice if it was down on one cylinder but with those bigger motors you may not know you have a carb blockage on just one carb til too late.
Where are you actually boating, are you up inland rivers, or into the Tasman/Coral Sea? Im out into the Pacific with home port being the Bay of Islands
And do post how you get on with the thermostats, hopefully someone removed them due to not knowing that was a bad idea rather than some hail mary idea to reduce water pressure through the engine to stop a leak or something perhaps in the gasket faces
Anyway have a good run out on the water
Hi Bos,
Last night pulled the entire carb system apart. Cleaned every needle, float etc and blew it all down. Each rubber gasket sealed with o ring lube and paper gaskets cleaned down. Half completed a Lync & Sync, bnut had to wait to get fully in the water.
So the following has now been done on this engine.
1. New water pump kit
2. Lower Gear Oil
3. Plugs & Leads
4. Decarb
5. Pulled down cleaned reeds with new gaskets
6. Total pull down of carbs and cleaned.
7. New inline fuel filter with new lines and new eastener water sep fuel filter at tank.
8. New vacuum fuel pump and flushed fuel tank.
9. New Thermostats and gaskets
10. New Head Gaskets
I got it on the Brisbane River which is where I have been running a lot other than the Tweed. Mostly will run around the Moreton bay areas and get up to freshwater lakes.
Launching today it fired up well. We tied her to the pontoon and started to adjust the idler screw. I found the throttle shaft to be loose to both timing lkink and carb cam. The conk/knock stops a little (Or knock in less revolutions) when I move time one into fixed position. I know from the carb link side I'm sweet as the valve and roller are all in line.
The knock is at its worst at 2k and is gone by 3k. It is working so much better though. At 900 in gear there is no suff, just the slight mean to conk. It is a lot smother in acceleration, and speeds are gained alot quicker.
The thermos are definitely better, Our max temp was 140f like the thermo set. I believe they have helped the idle by bringing the temp up like you say. This I think made the best gain. The tell tale outlet is running so much better in neutral also. When I was flushing I didn't need to get in the boat to touch throttle, the water stream was not a drizzle any more.
I think the previous owner mechanic was a half wit and tried modding the engine to being more performance or something...
I'm almost there with the tune but don't think myself personally cant get much better than it is without timing light and better/confident know how. What do you guys think????
My wife said apparently I have spent $2800 on the repair to this boat. I fell over and really question how it's that much when I didn't buy big expensive items.
However, in addition to the above I guess I have done more:
1. Dry out, inject glycol and resin inject transom. some rot around bung had to rid of.
2. New battery and anchor
3. Fibreglass repairs and flow coat areas.
4. Install ports etc and general maintenance
Bloody hell it adds up!
Thanks again!
Riley
