Conversion parts could end being costly specially the ECU. Which boat with how many souls onboard is the current 25 HP powering ? Propping right that motor to less pitches from current one to rev towards its max wot rpm range factory stated will better the current hole shot and overlall water...
Once the carb is pristine clean, buy a motor stand or build one for yourself, motors should be kept resting full vertical. A stand will also serve well for running carb dry, flushing, preventive maintenance and general repair purposes...
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Assume the tank's air valve was open when experienced that issue ? When was the last time the carb was fully serviced (cleaned) if it was a carb related issue once working and idling fine if the motor tends to starve and need to prime the bulb again and again, it's a fuel pump related issues...
Cylinder head, exhaust covers "Probably OK" doesn't say much, checking with a torque wrench will tell. The motor will run good, the issue is that on the long run could have slight water intrusion on those bolts gaskets and with time and use will end being seized, worse if boating in salted...
With an overheat depending how serious it was will need to retorque the cylinder head and exhaust covers gaskets back to specs. Check if possible with a torque wrench.
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If suspect there's still impeler bits clogging any water passage, remove thermo, bolt lid back on and flush again while on muffs, barrel, flushing port and check if pees again. So that motor needs to be flushed through the flushing port with motor OFF, right ?
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Once logged in at Iboats always stayed logged, would't matter if puting the LapTop to sleep, restarting it or shutting it off, same if shutting the old desktop off while being logged in. Never log out of either one...
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You're welcome, those motors are currently being fabricated so long live the spare parts availability, a proper serviced and maintained motor will not requiere rebuild kits any time soon...
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Those magnets are bullet proof, have sold 30 of those 25-30 HP motors and non with issues, the magnets are heavily attached to the flywheel with a super glue which isn't mentioned nowhere. Will only break in pieces if a shade tree mechanic bangs Flington's Style side of the flywheel with a...
The converted 4 stroke 15 HP carb motor probably runs with slight more timing advance than the standard 9.9 one, a matter to check the Merc's Service Manual timing specs if ever mentioned ? If those are exact same rebadged Tohatsu versions the Tohatsu's Service Manual will surely mention both...
Congrats nice combo, what's the current transom condition, is it still well attached to the tubes or becoming unglued specially at the upper transom and adjacent side tubes ? Is the Saturn being inflated to its recommended working pressure with at least 3.0 PSI once floating ?
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Which parts may that be that plan replacing ? Forgot to ask, when removed the thermostat what was the internal thmo housing condition, was it clean, rusted, salty, awful looking ?
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Don't worry Sparkey take your time, that horse needs to be fully operational before working on the carb/timing advance synch. That's the bolt that crosses side of the steering shaft and secures the middle leg in place, right ? Sorry can't help you on this one, never have issues with seized...
To the OP, what have you done so far, did it worked and now the motor is peeing right or remains with same issues as when starting the thread ?
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I know...Leak Down Test pressurizing the motor with a manual pump to at least 5 PSI for 5 minutes, the issue is that's impossible to perform without the right tools for such specialized test which the mayority doesn't have...
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Tohatsu's metal reeds are near bullet proof and usually never go bad unless groped. If suspicious there's an air leak, with motor ON spray some soapy water with a small spray bottle behind the carb and the beginning of the reed valve assy and check if with bubbles. An air leak usually revs the...
You're welcome, on a motor which has never been decarbonized ever before won't remove heavy carbon build ups on the cylinder head, exhaust covers and lower crankcase exhaust but will clean pistons, pistons rings for a smoother ring free motor operation. Should be applied ideally every 50 run...
Tohatsu calls for a min 70 Amp or over battery, at just 12.6 it's only charged at 3/4. At 13.2 V will be fully charged. If all the electricals related are in opt state seems the current battery it's loosing its top juice...
Happy Boating
